diff --git a/nav_msgs/msg/Path.msg b/nav_msgs/msg/Path.msg
index 8be8de72..939f88fa 100644
--- a/nav_msgs/msg/Path.msg
+++ b/nav_msgs/msg/Path.msg
@@ -5,3 +5,4 @@ std_msgs/Header header
 
 # Array of poses to follow.
 geometry_msgs/PoseStamped[] poses
+float32[] costs