diff --git a/ArduSub/Sub.h b/ArduSub/Sub.h
index 653dc8e70b..390d95f74d 100644
--- a/ArduSub/Sub.h
+++ b/ArduSub/Sub.h
@@ -204,7 +204,7 @@ private:
 
     // Optical flow sensor
 #if OPTFLOW == ENABLED
-    OpticalFlow optflow{ahrs};
+    OpticalFlow optflow;
 #endif
 
     // system time in milliseconds of last recorded yaw reset from ekf