diff --git a/src/modules/ekf2/Utility/PreFlightChecker.cpp b/src/modules/ekf2/Utility/PreFlightChecker.cpp
index bdb70498fa..da332a44ae 100644
--- a/src/modules/ekf2/Utility/PreFlightChecker.cpp
+++ b/src/modules/ekf2/Utility/PreFlightChecker.cpp
@@ -86,7 +86,7 @@ bool PreFlightChecker::preFlightCheckHorizVelFailed(const estimator_innovations_
 		const Vector2f flow_innov = Vector2f(innov.flow);
 		Vector2f flow_innov_lpf;
 		flow_innov_lpf(0) = _filter_flow_x_innov.update(flow_innov(0), alpha, _flow_innov_spike_lim);
-		flow_innov_lpf(1) = _filter_flow_x_innov.update(flow_innov(1), alpha, _flow_innov_spike_lim);
+		flow_innov_lpf(1) = _filter_flow_y_innov.update(flow_innov(1), alpha, _flow_innov_spike_lim);
 		has_failed |= checkInnov2DFailed(flow_innov_lpf, flow_innov, _flow_innov_test_lim, 5.f * _flow_innov_spike_lim);
 	}