diff --git a/Marlin/pins_RIGIDBOARD.h b/Marlin/pins_RIGIDBOARD.h
index e98596350..f783d83c6 100644
--- a/Marlin/pins_RIGIDBOARD.h
+++ b/Marlin/pins_RIGIDBOARD.h
@@ -36,6 +36,7 @@
 //
 // MOSFET changes
 //
+#define RAMPS_D9_PIN        8   // FAN (by default)
 #define RAMPS_D10_PIN       9   // EXTRUDER 1
 #define MOSFET_D_PIN       12   // EXTRUDER 2 or FAN