diff --git a/libraries/AP_NavEKF/AP_NavEKF.cpp b/libraries/AP_NavEKF/AP_NavEKF.cpp
index c2f7daa305..5c8745cb58 100644
--- a/libraries/AP_NavEKF/AP_NavEKF.cpp
+++ b/libraries/AP_NavEKF/AP_NavEKF.cpp
@@ -1005,6 +1005,7 @@ void NavEKF::SelectFlowFusion()
         flowRadXY[0]        = 0.0f;
         flowRadXY[1]        = 0.0f;
         omegaAcrossFlowTime.zero();
+        flowDataValid = true;
     }
     // If the flow measurements have been rejected for too long and we are relying on them, then revert to constant position mode
     if ((flowSensorTimeout || flowFusionTimeout) && PV_AidingMode == AID_RELATIVE) {