diff --git a/Marlin/src/pins/stm32f1/pins_CHITU3D_V6.h b/Marlin/src/pins/stm32f1/pins_CHITU3D_V6.h
index 75aa9146f3..7a3777da46 100644
--- a/Marlin/src/pins/stm32f1/pins_CHITU3D_V6.h
+++ b/Marlin/src/pins/stm32f1/pins_CHITU3D_V6.h
@@ -111,7 +111,13 @@
 #define BEEPER_PIN                          PB0
 //#define LED_PIN                           PD3
 //#define POWER_LOSS_PIN                    PG2   // PG4 PW_DET
-#define FIL_RUNOUT_PIN                      PA15  // MT_DET
+
+#ifndef FIL_RUNOUT_PIN
+  #define FIL_RUNOUT_PIN                    PA15  // MT_DET
+#endif
+#ifndef FIL_RUNOUT2_PIN
+  #define FIL_RUNOUT2_PIN                   PF13
+#endif
 
 //
 // TronXY TFT Support