diff --git a/Marlin/pins_5DPRINT.h b/Marlin/pins_5DPRINT.h
index 56281ea21..43b4a9f09 100644
--- a/Marlin/pins_5DPRINT.h
+++ b/Marlin/pins_5DPRINT.h
@@ -47,7 +47,6 @@
 #define LED_PIN            -1
 #define PS_ON_PIN          -1
 #define KILL_PIN           -1
-#define ALARM_PIN          -1
 
 // The SDSS pin uses a different pin mapping from file Sd2PinMap.h
 #define SDSS               20
diff --git a/Marlin/pins_BRAINWAVE.h b/Marlin/pins_BRAINWAVE.h
index c95a2b07c..34360a909 100644
--- a/Marlin/pins_BRAINWAVE.h
+++ b/Marlin/pins_BRAINWAVE.h
@@ -48,7 +48,6 @@
 #define LED_PIN            39
 #define PS_ON_PIN          -1
 #define KILL_PIN           -1
-#define ALARM_PIN          -1
 
 #if DISABLED(SDSUPPORT)
   // these pins are defined in the SD library if building with SD support
diff --git a/Marlin/pins_BRAINWAVE_PRO.h b/Marlin/pins_BRAINWAVE_PRO.h
index 8d1e53e1a..42eafb460 100644
--- a/Marlin/pins_BRAINWAVE_PRO.h
+++ b/Marlin/pins_BRAINWAVE_PRO.h
@@ -53,7 +53,6 @@
 #define LED_PIN            19
 #define PS_ON_PIN          -1
 #define KILL_PIN           -1
-#define ALARM_PIN          -1
 #define SD_DETECT_PIN      12
 
 #if DISABLED(SDSUPPORT)
diff --git a/Marlin/pins_PRINTRBOARD.h b/Marlin/pins_PRINTRBOARD.h
index 2b178aa33..2149cdf27 100644
--- a/Marlin/pins_PRINTRBOARD.h
+++ b/Marlin/pins_PRINTRBOARD.h
@@ -68,7 +68,6 @@
 #define LED_PIN            -1
 #define PS_ON_PIN          -1
 #define KILL_PIN           -1
-#define ALARM_PIN          -1
 
 #if DISABLED(SDSUPPORT)
   // these pins are defined in the SD library if building with SD support
diff --git a/Marlin/pins_SAV_MKI.h b/Marlin/pins_SAV_MKI.h
index 2bd1ef3e2..d09320f84 100644
--- a/Marlin/pins_SAV_MKI.h
+++ b/Marlin/pins_SAV_MKI.h
@@ -82,7 +82,6 @@
 #define SDPOWER            -1
 #define LED_PIN            -1
 #define PS_ON_PIN          -1
-#define ALARM_PIN          -1
 #define SD_DETECT_PIN      -1
 
 #define BEEPER_PIN         -1
diff --git a/Marlin/pins_TEENSY2.h b/Marlin/pins_TEENSY2.h
index a7adf2641..c54edc5cd 100644
--- a/Marlin/pins_TEENSY2.h
+++ b/Marlin/pins_TEENSY2.h
@@ -91,7 +91,6 @@
 #define LED_PIN             6
 #define PS_ON_PIN          27
 #define KILL_PIN           -1
-#define ALARM_PIN          -1
 
 #if DISABLED(SDSUPPORT)
   // these pins are defined in the SD library if building with SD support
diff --git a/Marlin/pins_TEENSYLU.h b/Marlin/pins_TEENSYLU.h
index 34fd986fd..8bae79bdd 100644
--- a/Marlin/pins_TEENSYLU.h
+++ b/Marlin/pins_TEENSYLU.h
@@ -58,7 +58,6 @@
 #define LED_PIN            -1
 #define PS_ON_PIN          -1
 #define KILL_PIN           -1
-#define ALARM_PIN          -1
 
 #if DISABLED(SDSUPPORT)
   // these pins are defined in the SD library if building with SD support