diff --git a/planning/behavior_velocity_crosswalk_module/src/scene_crosswalk.cpp b/planning/behavior_velocity_crosswalk_module/src/scene_crosswalk.cpp
index 22fd5202bbf17..c31402662a944 100644
--- a/planning/behavior_velocity_crosswalk_module/src/scene_crosswalk.cpp
+++ b/planning/behavior_velocity_crosswalk_module/src/scene_crosswalk.cpp
@@ -1229,6 +1229,8 @@ bool CrosswalkModule::checkRestartSuppression(
   const double dist_to_stop =
     calcSignedArcLength(ego_path.points, ego_pos, stop_factor->stop_pose.position);
 
+  // NOTE: min_dist_to_stop_for_restart_suppression is supposed to be the same as
+  //      the pid_longitudinal_controller's drive_state_stop_dist.
   return planner_param_.min_dist_to_stop_for_restart_suppression < dist_to_stop &&
          dist_to_stop < planner_param_.max_dist_to_stop_for_restart_suppression;
 }