diff --git a/Marlin/src/pins/pins_FORMBOT_TREX3.h b/Marlin/src/pins/pins_FORMBOT_TREX3.h
index dde947e3a6..9caa157d39 100644
--- a/Marlin/src/pins/pins_FORMBOT_TREX3.h
+++ b/Marlin/src/pins/pins_FORMBOT_TREX3.h
@@ -131,7 +131,7 @@
 #define FAN1_PIN           12
 
 #define NUM_RUNOUT_SENSORS  2
-#define FIL_RUNOUT_PIN     23
+#define FIL_RUNOUT_PIN     22
 #define FIL_RUNOUT2_PIN    21
 
 //