diff --git a/msg/trajectory_bezier.msg b/msg/trajectory_bezier.msg
index 813de4861e..e3d9d4e0ff 100644
--- a/msg/trajectory_bezier.msg
+++ b/msg/trajectory_bezier.msg
@@ -3,6 +3,6 @@
 
 uint64 timestamp		# time since system start (microseconds)
 
-float32[3] position
-float32 yaw
-float32 delta
+float32[3] position     # local position x,y,z (metres)
+float32 yaw             # yaw angle (rad)
+float32 delta           # time it should take to get to this waypoint, if this is the final waypoint (seconds)