diff --git a/Marlin/pins.h b/Marlin/pins.h
index a807f2aa8..fd79dc6e0 100644
--- a/Marlin/pins.h
+++ b/Marlin/pins.h
@@ -187,6 +187,7 @@
 #define HEATER_2_PIN -1
 #define HEATER_BED_PIN 3
 
+#define KILL_PIN -1
 
 #define SDPOWER -1
 #define SDSS -1 // SCL pin of I2C header