diff --git a/EKF/estimator_interface.cpp b/EKF/estimator_interface.cpp
index a426c3b510..b0f7ed92dd 100644
--- a/EKF/estimator_interface.cpp
+++ b/EKF/estimator_interface.cpp
@@ -121,17 +121,17 @@ void EstimatorInterface::setIMUData(uint64_t time_usec, uint64_t delta_ang_dt, u
 
 	// calculate a metric which indicates the amount of coning vibration
 	Vector3f temp = cross_product(imu_sample_new.delta_ang , _delta_ang_prev);
-	_vibe_metrics[0] = 0.99f * _vibe_metrics[0] + 0.01f * temp.length();
+	_vibe_metrics[0] = 0.99f * _vibe_metrics[0] + 0.01f * temp.norm();
 
 	// calculate a metric which indiates the amount of high frequency gyro vibration
 	temp = imu_sample_new.delta_ang - _delta_ang_prev;
 	_delta_ang_prev = imu_sample_new.delta_ang;
-	_vibe_metrics[1] = 0.99f * _vibe_metrics[1] + 0.01f * temp.length();
+	_vibe_metrics[1] = 0.99f * _vibe_metrics[1] + 0.01f * temp.norm();
 
 	// calculate a metric which indicates the amount of high fequency accelerometer vibration
 	temp = imu_sample_new.delta_vel - _delta_vel_prev;
 	_delta_vel_prev = imu_sample_new.delta_vel;
-	_vibe_metrics[2] = 0.99f * _vibe_metrics[2] + 0.01f * temp.length();
+	_vibe_metrics[2] = 0.99f * _vibe_metrics[2] + 0.01f * temp.norm();
 
 	// accumulate and down-sample imu data and push to the buffer when new downsampled data becomes available
 	if (collect_imu(imu_sample_new)) {