diff --git a/libraries/AP_AHRS/AP_AHRS_HIL.h b/libraries/AP_AHRS/AP_AHRS_HIL.h
index ea46cbe92affc70a834efc6081177524bbbc1c3d..20d903ffa6277346e518e025398c33eff086d5a0 100644
--- a/libraries/AP_AHRS/AP_AHRS_HIL.h
+++ b/libraries/AP_AHRS/AP_AHRS_HIL.h
@@ -32,6 +32,9 @@ public:
 	float get_error_rp(void) { return 0; }
 	float get_error_yaw(void) { return 0; }
 
+	// settable parameters
+	AP_Float	_kp_yaw;
+
 private:
 	Vector3f 	_omega;
 };