diff --git a/msg/ObstacleDistance.msg b/msg/ObstacleDistance.msg
index e3c4963ab2..e4a07d1cac 100644
--- a/msg/ObstacleDistance.msg
+++ b/msg/ObstacleDistance.msg
@@ -19,6 +19,6 @@ float32 increment # Angular width in degrees of each array element.
 uint16 min_distance # Minimum distance the sensor can measure in centimeters.
 uint16 max_distance # Maximum distance the sensor can measure in centimeters.
 
-float32 angle_offset # Relative angle offset of the 0-index element in the distances array. Value of 0 corresponds to forward. Positive values are offsets to the right.
+float32 angle_offset # Relative angle offset of the 0-index element in the distances array. Value of 0 corresponds to forward. Positive is clockwise direction, negative is counter-clockwise.
 
 # TOPICS obstacle_distance obstacle_distance_fused