diff --git a/Marlin/src/pins/stm32f4/pins_MKS_NEPTUNE_3.h b/Marlin/src/pins/stm32f4/pins_MKS_NEPTUNE_3.h
index 8df334d740..c5189dd6dc 100644
--- a/Marlin/src/pins/stm32f4/pins_MKS_NEPTUNE_3.h
+++ b/Marlin/src/pins/stm32f4/pins_MKS_NEPTUNE_3.h
@@ -111,7 +111,7 @@
 #define HEATER_0_PIN                        PA6   // HEATER1
 #define HEATER_BED_PIN                      PA5   // HOT BED
 
-#define FAN_PIN                             PB0   // FAN
+#define FAN0_PIN                            PB0   // FAN
 //#define FAN1_PIN                          PA7   // FAN1
 
 #if NEED_TOUCH_PINS
diff --git a/Marlin/src/pins/stm32f4/pins_MKS_NEPTUNE_X_common.h b/Marlin/src/pins/stm32f4/pins_MKS_NEPTUNE_X_common.h
index 39d1de237e..d5883ade59 100644
--- a/Marlin/src/pins/stm32f4/pins_MKS_NEPTUNE_X_common.h
+++ b/Marlin/src/pins/stm32f4/pins_MKS_NEPTUNE_X_common.h
@@ -133,7 +133,7 @@
 #define HEATER_1_PIN                        PB0   // HEATER2
 #define HEATER_BED_PIN                      PA0   // HOT BED
 
-#define FAN_PIN                             PC14  // FAN
+#define FAN0_PIN                            PC14  // FAN
 #define FAN1_PIN                            PB1   // FAN1
 
 //