diff --git a/planning/obstacle_cruise_planner/config/obstacle_cruise_planner.param.yaml b/planning/obstacle_cruise_planner/config/obstacle_cruise_planner.param.yaml
index 2ccd000657948..08cee3d58152e 100644
--- a/planning/obstacle_cruise_planner/config/obstacle_cruise_planner.param.yaml
+++ b/planning/obstacle_cruise_planner/config/obstacle_cruise_planner.param.yaml
@@ -88,7 +88,7 @@
 
       stop:
         max_lat_margin: 0.3 # lateral margin between the obstacles except for unknown and ego's footprint
-        max_lat_margin_against_unknown: -0.3 # lateral margin between the unknown obstacles and ego's footprint
+        max_lat_margin_against_unknown: 0.3 # lateral margin between the unknown obstacles and ego's footprint
         crossing_obstacle:
           collision_time_margin : 4.0 # time threshold of collision between obstacle adn ego for cruise or stop [s]