diff --git a/libraries/APM_Control/AP_YawController.h b/libraries/APM_Control/AP_YawController.h
index 08369a2869..d5e11e9143 100644
--- a/libraries/APM_Control/AP_YawController.h
+++ b/libraries/APM_Control/AP_YawController.h
@@ -35,7 +35,6 @@ private:
 	AP_Float _K_FF;
     AP_Int16 _imax;
 	uint32_t _last_t;
-	float _last_error;
 	float _last_out;
 	float _last_rate_hp_out;
 	float _last_rate_hp_in;