diff --git a/Marlin/src/pins/pins_FORMBOT_TREX3.h b/Marlin/src/pins/pins_FORMBOT_TREX3.h
index 5591edcbf..a20e0dae3 100644
--- a/Marlin/src/pins/pins_FORMBOT_TREX3.h
+++ b/Marlin/src/pins/pins_FORMBOT_TREX3.h
@@ -160,10 +160,6 @@
 // Use the RAMPS 1.4 Analog input 5 on the AUX2 connector
 #define FILWIDTH_PIN        5   // Analog Input
 
-#ifndef PS_ON_PIN
-  #define PS_ON_PIN        12
-#endif
-
 //
 // LCD / Controller
 //