diff --git a/Marlin/stepper.cpp b/Marlin/stepper.cpp
index fa1e9bfdcf..395b517863 100644
--- a/Marlin/stepper.cpp
+++ b/Marlin/stepper.cpp
@@ -942,6 +942,13 @@ void st_init() {
       WRITE(Z_MIN_PIN,HIGH);
     #endif
   #endif
+  
+  #if HAS_Z2_MIN
+    SET_INPUT(Z2_MIN_PIN);
+    #if ENABLED(ENDSTOPPULLUP_ZMIN)
+      WRITE(Z2_MIN_PIN,HIGH);
+    #endif
+  #endif
 
   #if HAS_X_MAX
     SET_INPUT(X_MAX_PIN);