diff --git a/Marlin/Conditionals.h b/Marlin/Conditionals.h
index d8d436496..b218d7b16 100644
--- a/Marlin/Conditionals.h
+++ b/Marlin/Conditionals.h
@@ -643,7 +643,7 @@
   #define HAS_SERVO_2 (PIN_EXISTS(SERVO2))
   #define HAS_SERVO_3 (PIN_EXISTS(SERVO3))
   #define HAS_FILAMENT_WIDTH_SENSOR (PIN_EXISTS(FILWIDTH))
-  #define HAS_FILRUNOUT (PIN_EXISTS(FILRUNOUT))
+  #define HAS_FIL_RUNOUT (PIN_EXISTS(FIL_RUNOUT))
   #define HAS_HOME (PIN_EXISTS(HOME))
   #define HAS_KILL (PIN_EXISTS(KILL))
   #define HAS_SUICIDE (PIN_EXISTS(SUICIDE))
diff --git a/Marlin/Configuration.h b/Marlin/Configuration.h
index 110a69358..49a4c84bf 100644
--- a/Marlin/Configuration.h
+++ b/Marlin/Configuration.h
@@ -585,7 +585,7 @@ const bool Z_MIN_PROBE_ENDSTOP_INVERTING = false; // set to true to invert the l
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = true;  // Should be uncommented and true or false should assigned
+  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index bed43b370..ebb28a5ba 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -689,9 +689,9 @@ void setup_killpin() {
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
 
   void setup_filrunoutpin() {
-    pinMode(FILRUNOUT_PIN, INPUT);
+    pinMode(FIL_RUNOUT_PIN, INPUT);
     #if ENABLED(ENDSTOPPULLUP_FIL_RUNOUT)
-      WRITE(FILRUNOUT_PIN, HIGH);
+      WRITE(FIL_RUNOUT_PIN, HIGH);
     #endif
   }
 
@@ -8167,7 +8167,7 @@ void idle(
 void manage_inactivity(bool ignore_stepper_queue/*=false*/) {
 
   #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-    if (IS_SD_PRINTING && !(READ(FILRUNOUT_PIN) ^ FIL_RUNOUT_INVERTING))
+    if (IS_SD_PRINTING && !(READ(FIL_RUNOUT_PIN) ^ FIL_RUNOUT_INVERTING))
       handle_filament_runout();
   #endif
 
diff --git a/Marlin/SanityCheck.h b/Marlin/SanityCheck.h
index 96229c784..9fa8b87be 100644
--- a/Marlin/SanityCheck.h
+++ b/Marlin/SanityCheck.h
@@ -128,8 +128,8 @@
  * Filament Runout needs a pin and SD Support
  */
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  #if !HAS_FILRUNOUT
-    #error "FILAMENT_RUNOUT_SENSOR requires FILRUNOUT_PIN."
+  #if !HAS_FIL_RUNOUT
+    #error "FILAMENT_RUNOUT_SENSOR requires FIL_RUNOUT_PIN."
   #elif DISABLED(SDSUPPORT)
     #error "FILAMENT_RUNOUT_SENSOR requires SDSUPPORT."
   #endif
diff --git a/Marlin/example_configurations/Cartesio/Configuration.h b/Marlin/example_configurations/Cartesio/Configuration.h
index 59bae3aef..ad240da88 100644
--- a/Marlin/example_configurations/Cartesio/Configuration.h
+++ b/Marlin/example_configurations/Cartesio/Configuration.h
@@ -584,7 +584,7 @@ const bool Z_MIN_PROBE_ENDSTOP_INVERTING = false; // set to true to invert the l
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = true;  // Should be uncommented and true or false should assigned
+  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/Felix/Configuration.h b/Marlin/example_configurations/Felix/Configuration.h
index c6cf6ced4..2b03a996a 100644
--- a/Marlin/example_configurations/Felix/Configuration.h
+++ b/Marlin/example_configurations/Felix/Configuration.h
@@ -567,7 +567,7 @@ const bool Z_MIN_PROBE_ENDSTOP_INVERTING = false; // set to true to invert the l
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = true;  // Should be uncommented and true or false should assigned
+  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/Felix/DUAL/Configuration.h b/Marlin/example_configurations/Felix/DUAL/Configuration.h
index 6450926b3..8aa3797ae 100644
--- a/Marlin/example_configurations/Felix/DUAL/Configuration.h
+++ b/Marlin/example_configurations/Felix/DUAL/Configuration.h
@@ -565,7 +565,7 @@ const bool Z_MIN_PROBE_ENDSTOP_INVERTING = false; // set to true to invert the l
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = true;  // Should be uncommented and true or false should assigned
+  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/Hephestos/Configuration.h b/Marlin/example_configurations/Hephestos/Configuration.h
index 34677795b..ea372e1dc 100644
--- a/Marlin/example_configurations/Hephestos/Configuration.h
+++ b/Marlin/example_configurations/Hephestos/Configuration.h
@@ -577,7 +577,7 @@ const bool Z_MIN_PROBE_ENDSTOP_INVERTING = true; // set to true to invert the lo
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = true;  // Should be uncommented and true or false should assigned
+  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/Hephestos_2/Configuration.h b/Marlin/example_configurations/Hephestos_2/Configuration.h
index 409eeb92a..012117ed0 100644
--- a/Marlin/example_configurations/Hephestos_2/Configuration.h
+++ b/Marlin/example_configurations/Hephestos_2/Configuration.h
@@ -579,7 +579,7 @@ const bool Z_MIN_PROBE_ENDSTOP_INVERTING = false; // set to true to invert the l
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = true;  // Should be uncommented and true or false should assigned
+  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/K8200/Configuration.h b/Marlin/example_configurations/K8200/Configuration.h
index b53d26c37..c9c352fb2 100644
--- a/Marlin/example_configurations/K8200/Configuration.h
+++ b/Marlin/example_configurations/K8200/Configuration.h
@@ -602,7 +602,7 @@ const bool Z_MIN_PROBE_ENDSTOP_INVERTING = false; // set to true to invert the l
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = true;  // Should be uncommented and true or false should assigned
+  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/RepRapWorld/Megatronics/Configuration.h b/Marlin/example_configurations/RepRapWorld/Megatronics/Configuration.h
index c473516ea..0bf419522 100644
--- a/Marlin/example_configurations/RepRapWorld/Megatronics/Configuration.h
+++ b/Marlin/example_configurations/RepRapWorld/Megatronics/Configuration.h
@@ -585,7 +585,7 @@ const bool Z_MIN_PROBE_ENDSTOP_INVERTING = false; // set to true to invert the l
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = true;  // Should be uncommented and true or false should assigned
+  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/RigidBot/Configuration.h b/Marlin/example_configurations/RigidBot/Configuration.h
index 91251354d..d6f7fec37 100644
--- a/Marlin/example_configurations/RigidBot/Configuration.h
+++ b/Marlin/example_configurations/RigidBot/Configuration.h
@@ -579,7 +579,7 @@ const bool Z_MIN_PROBE_ENDSTOP_INVERTING = false; // set to true to invert the l
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = true;  // Should be uncommented and true or false should assigned
+  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/SCARA/Configuration.h b/Marlin/example_configurations/SCARA/Configuration.h
index 9244c373e..1325404f9 100644
--- a/Marlin/example_configurations/SCARA/Configuration.h
+++ b/Marlin/example_configurations/SCARA/Configuration.h
@@ -593,7 +593,7 @@ const bool Z_MIN_PROBE_ENDSTOP_INVERTING = false; // set to true to invert the l
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = true;  // Should be uncommented and true or false should assigned
+  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/TAZ4/Configuration.h b/Marlin/example_configurations/TAZ4/Configuration.h
index 914e365d3..077ae99c6 100644
--- a/Marlin/example_configurations/TAZ4/Configuration.h
+++ b/Marlin/example_configurations/TAZ4/Configuration.h
@@ -606,7 +606,7 @@ const bool Z_MIN_PROBE_ENDSTOP_INVERTING = false; // set to true to invert the l
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = true;  // Should be uncommented and true or false should assigned
+  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/WITBOX/Configuration.h b/Marlin/example_configurations/WITBOX/Configuration.h
index 7a3a81d69..40eace601 100644
--- a/Marlin/example_configurations/WITBOX/Configuration.h
+++ b/Marlin/example_configurations/WITBOX/Configuration.h
@@ -577,7 +577,7 @@ const bool Z_MIN_PROBE_ENDSTOP_INVERTING = true; // set to true to invert the lo
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = true;  // Should be uncommented and true or false should assigned
+  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/adafruit/ST7565/Configuration.h b/Marlin/example_configurations/adafruit/ST7565/Configuration.h
index a867c21d7..64aedccd2 100644
--- a/Marlin/example_configurations/adafruit/ST7565/Configuration.h
+++ b/Marlin/example_configurations/adafruit/ST7565/Configuration.h
@@ -585,7 +585,7 @@ const bool Z_MIN_PROBE_ENDSTOP_INVERTING = false; // set to true to invert the l
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = true;  // Should be uncommented and true or false should assigned
+  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/delta/biv2.5/Configuration.h b/Marlin/example_configurations/delta/biv2.5/Configuration.h
index 477b588a2..a1d12825e 100644
--- a/Marlin/example_configurations/delta/biv2.5/Configuration.h
+++ b/Marlin/example_configurations/delta/biv2.5/Configuration.h
@@ -664,7 +664,7 @@ const bool Z_MIN_PROBE_ENDSTOP_INVERTING = true; // set to true to invert the lo
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = true;  // Should be uncommented and true or false should assigned
+  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/delta/generic/Configuration.h b/Marlin/example_configurations/delta/generic/Configuration.h
index a83275b7e..215df5fb7 100644
--- a/Marlin/example_configurations/delta/generic/Configuration.h
+++ b/Marlin/example_configurations/delta/generic/Configuration.h
@@ -658,7 +658,7 @@ const bool Z_MIN_PROBE_ENDSTOP_INVERTING = true; // set to true to invert the lo
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = true;  // Should be uncommented and true or false should assigned
+  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/delta/kossel_mini/Configuration.h b/Marlin/example_configurations/delta/kossel_mini/Configuration.h
index 08fe93f4f..688a53def 100644
--- a/Marlin/example_configurations/delta/kossel_mini/Configuration.h
+++ b/Marlin/example_configurations/delta/kossel_mini/Configuration.h
@@ -661,7 +661,7 @@ const bool Z_MIN_PROBE_ENDSTOP_INVERTING = false; // set to true to invert the l
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = true;  // Should be uncommented and true or false should assigned
+  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/delta/kossel_pro/Configuration.h b/Marlin/example_configurations/delta/kossel_pro/Configuration.h
index 7e99ebb0a..8af093a9b 100644
--- a/Marlin/example_configurations/delta/kossel_pro/Configuration.h
+++ b/Marlin/example_configurations/delta/kossel_pro/Configuration.h
@@ -655,7 +655,7 @@ const bool Z_MIN_PROBE_ENDSTOP_INVERTING = false; // set to true to invert the l
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = true;  // Should be uncommented and true or false should assigned
+  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/delta/kossel_xl/Configuration.h b/Marlin/example_configurations/delta/kossel_xl/Configuration.h
index eae1d8de2..d97d5dfb9 100644
--- a/Marlin/example_configurations/delta/kossel_xl/Configuration.h
+++ b/Marlin/example_configurations/delta/kossel_xl/Configuration.h
@@ -656,7 +656,7 @@ const bool Z_MIN_PROBE_ENDSTOP_INVERTING = false; // set to true to invert the l
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = true;  // Should be uncommented and true or false should assigned
+  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/makibox/Configuration.h b/Marlin/example_configurations/makibox/Configuration.h
index d1ee89076..d06bbb04d 100644
--- a/Marlin/example_configurations/makibox/Configuration.h
+++ b/Marlin/example_configurations/makibox/Configuration.h
@@ -588,7 +588,7 @@ const bool Z_MIN_PROBE_ENDSTOP_INVERTING = false; // set to true to invert the l
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = true;  // Should be uncommented and true or false should assigned
+  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/example_configurations/tvrrug/Round2/Configuration.h b/Marlin/example_configurations/tvrrug/Round2/Configuration.h
index b591e82e9..ef06e4212 100644
--- a/Marlin/example_configurations/tvrrug/Round2/Configuration.h
+++ b/Marlin/example_configurations/tvrrug/Round2/Configuration.h
@@ -575,7 +575,7 @@ const bool Z_MIN_PROBE_ENDSTOP_INVERTING = true; // set to true to invert the lo
                                  // It is assumed that when logic high = filament available
                                  //                    when logic  low = filament ran out
 #if ENABLED(FILAMENT_RUNOUT_SENSOR)
-  const bool FIL_RUNOUT_INVERTING = true;  // Should be uncommented and true or false should assigned
+  const bool FIL_RUNOUT_INVERTING = false; // set to true to invert the logic of the sensor.
   #define ENDSTOPPULLUP_FIL_RUNOUT // Uncomment to use internal pullup for filament runout pins if the sensor is defined.
   #define FILAMENT_RUNOUT_SCRIPT "M600"
 #endif
diff --git a/Marlin/pins_CNCONTROLS_12.h b/Marlin/pins_CNCONTROLS_12.h
index 334251ef5..850455670 100644
--- a/Marlin/pins_CNCONTROLS_12.h
+++ b/Marlin/pins_CNCONTROLS_12.h
@@ -67,7 +67,7 @@
 //common I/O
 
  //#define TEMP_CHAMBER_PIN        13  // ANALOG INPUT !!
- #define FILRUNOUT_PIN             18
+ #define FIL_RUNOUT_PIN            18
  //#define PWM_1_PIN               12
  //#define PWM_2_PIN               13 
  //#define SPARE_IO                17  
diff --git a/Marlin/pins_RAMPS_14.h b/Marlin/pins_RAMPS_14.h
index 48d64fe63..55e810aa6 100644
--- a/Marlin/pins_RAMPS_14.h
+++ b/Marlin/pins_RAMPS_14.h
@@ -99,7 +99,7 @@
 #endif
 
 // define digital pin 4 for the filament runout sensor. Use the RAMPS 1.4 digital input 4 on the servos connector
-#define FILRUNOUT_PIN       4
+#define FIL_RUNOUT_PIN      4
 
 #if MB(RAMPS_14_EFF) || MB(RAMPS_13_EFF) || ENABLED(IS_RAMPS_EFB)
   #define FAN_PIN           9 // (Sprinter config)