diff --git a/ArduCopter/Copter.h b/ArduCopter/Copter.h
index 68e0742b27..62cb5befed 100644
--- a/ArduCopter/Copter.h
+++ b/ArduCopter/Copter.h
@@ -514,7 +514,7 @@ private:
 
     // AC_Fence library to reduce fly-aways
 #if AC_FENCE == ENABLED
-    AC_Fence fence = AC_Fence::create(ahrs, inertial_nav);
+    AC_Fence fence = AC_Fence::create(ahrs);
 #endif
 
 #if AC_AVOID_ENABLED == ENABLED