diff --git a/ArduCopter/mode_drift.cpp b/ArduCopter/mode_drift.cpp
index 6e1eb45198..43d8b107e1 100644
--- a/ArduCopter/mode_drift.cpp
+++ b/ArduCopter/mode_drift.cpp
@@ -1,5 +1,7 @@
 #include "Copter.h"
 
+#if MODE_DRIFT_ENABLED == ENABLED
+
 /*
  * Init and run calls for drift flight mode
  */
@@ -124,3 +126,4 @@ float Copter::ModeDrift::get_throttle_assist(float velz, float pilot_throttle_sc
     
     return constrain_float(pilot_throttle_scaled + thr_assist, 0.0f, 1.0f);
 }
+#endif