diff --git a/ArduCopter/APM_Config.h b/ArduCopter/APM_Config.h
index 540f505875d20bbe84c313d68648b482daa01dfa..915f7143ad19dc3f7883b72ed8bf346202936699 100644
--- a/ArduCopter/APM_Config.h
+++ b/ArduCopter/APM_Config.h
@@ -43,7 +43,7 @@
 
 #define ACCEL_ALT_HOLD 0		// disabled by default, work in progress
 
-#define INERTIAL_NAV ENABLED
+#define INERTIAL_NAV DISABLED
 
 
 #if INERTIAL_NAV == ENABLED