diff --git a/Marlin/src/pins/stm32f1/pins_CREALITY_V4.h b/Marlin/src/pins/stm32f1/pins_CREALITY_V4.h
index 8a413945b7..ed281eb00c 100644
--- a/Marlin/src/pins/stm32f1/pins_CREALITY_V4.h
+++ b/Marlin/src/pins/stm32f1/pins_CREALITY_V4.h
@@ -79,6 +79,13 @@
 
 #define Z_PROBE_PIN                         PB1   // BLTouch IN
 
+//
+// Filament Runout Sensor
+//
+#ifndef FIL_RUNOUT_PIN
+  #define FIL_RUNOUT_PIN                    PA4   // "Pulled-high"
+#endif
+
 //
 // Steppers
 //