diff --git a/EKF/estimator_interface.cpp b/EKF/estimator_interface.cpp
index f029d746ae..d94cd57dbc 100644
--- a/EKF/estimator_interface.cpp
+++ b/EKF/estimator_interface.cpp
@@ -548,9 +548,9 @@ int EstimatorInterface::getNumberOfActiveHorizontalAidingSources() const
 	       + int(_control_status.flags.opt_flow)
 	       + int(_control_status.flags.ev_pos)
 	       + int(_control_status.flags.ev_vel)
-		   // Combined airspeed and sideslip fusion allows sustained wind relative dead reckoning
-		   // and so is treated as a single aiding source.
-		   + int(_control_status.flags.fuse_aspd && _control_status.flags.fuse_beta);
+	       // Combined airspeed and sideslip fusion allows sustained wind relative dead reckoning
+	       // and so is treated as a single aiding source.
+	       + int(_control_status.flags.fuse_aspd && _control_status.flags.fuse_beta);
 }
 
 bool EstimatorInterface::isHorizontalAidingActive() const