diff --git a/msg/position_controller_status.msg b/msg/position_controller_status.msg
index 43e1c0589b..2f77ceefa3 100644
--- a/msg/position_controller_status.msg
+++ b/msg/position_controller_status.msg
@@ -12,3 +12,5 @@ float32 wp_dist
 float32 acceptance_radius		# the optimal distance to a waypoint to switch to the next
 
 float32 yaw_acceptance			# NaN if not set
+
+float32 altitude_acceptance_radius # the optimal vertical distance to a waypoint to switch to the next