diff --git a/EKF/control.cpp b/EKF/control.cpp
index 9148d0cf84..aaf48dbb87 100644
--- a/EKF/control.cpp
+++ b/EKF/control.cpp
@@ -300,7 +300,7 @@ void Ekf::controlExternalVisionFusion()
 			// innovation gate size
 			ev_pos_innov_gates(0) = fmaxf(_params.ev_pos_innov_gate, 1.0f);
 
-			fuseHorizontalPosition(_ev_pos_innov, ev_pos_innov_gates, ev_pos_obs_var, _ev_pos_innov_var, _ev_pos_test_ratio, false);
+			fuseHorizontalPosition(_ev_pos_innov, ev_pos_innov_gates, ev_pos_obs_var, _ev_pos_innov_var, _ev_pos_test_ratio);
 		}
 
 		// determine if we should use the velocity observations
@@ -712,7 +712,7 @@ void Ekf::controlGpsFusion()
 			// fuse GPS measurement
 			fuseHorizontalVelocity(_gps_vel_innov, gps_vel_innov_gates,gps_vel_obs_var, _gps_vel_innov_var, _gps_vel_test_ratio);
 			fuseVerticalVelocity(_gps_vel_innov, gps_vel_innov_gates, gps_vel_obs_var, _gps_vel_innov_var, _gps_vel_test_ratio);
-			fuseHorizontalPosition(_gps_pos_innov, gps_pos_innov_gates, gps_pos_obs_var, _gps_pos_innov_var, _gps_pos_test_ratio, false);
+			fuseHorizontalPosition(_gps_pos_innov, gps_pos_innov_gates, gps_pos_obs_var, _gps_pos_innov_var, _gps_pos_test_ratio);
 		}
 
 	} else if (_control_status.flags.gps && (_imu_sample_delayed.time_us - _gps_sample_delayed.time_us > (uint64_t)10e6)) {
diff --git a/EKF/ekf.h b/EKF/ekf.h
index 9b1532e493..35136f5433 100644
--- a/EKF/ekf.h
+++ b/EKF/ekf.h
@@ -622,7 +622,7 @@ private:
 				  Vector3f &innov_var, Vector2f &test_ratio);
 
 	bool fuseHorizontalPosition(const Vector3f &innov, const Vector2f &innov_gate, const Vector3f &obs_var,
-				    Vector3f &innov_var, Vector2f &test_ratiov, bool inhibit_gate);
+				    Vector3f &innov_var, Vector2f &test_ratiov, bool inhibit_gate = false);
 
 	bool fuseVerticalPosition(const Vector3f &innov, const Vector2f &innov_gate, const Vector3f &obs_var,
 				  Vector3f &innov_var, Vector2f &test_ratio);