diff --git a/autoware_launch/config/planning/scenario_planning/lane_driving/motion_planning/obstacle_cruise_planner/obstacle_cruise_planner.param.yaml b/autoware_launch/config/planning/scenario_planning/lane_driving/motion_planning/obstacle_cruise_planner/obstacle_cruise_planner.param.yaml
index 37d3ab4984..b525d2914a 100644
--- a/autoware_launch/config/planning/scenario_planning/lane_driving/motion_planning/obstacle_cruise_planner/obstacle_cruise_planner.param.yaml
+++ b/autoware_launch/config/planning/scenario_planning/lane_driving/motion_planning/obstacle_cruise_planner/obstacle_cruise_planner.param.yaml
@@ -51,7 +51,7 @@
           pedestrian: false
 
       slow_down_obstacle_type:
-        unknown: true
+        unknown: false
         car: true
         truck: true
         bus: true