diff --git a/planning/behavior_velocity_run_out_module/src/debug.cpp b/planning/behavior_velocity_run_out_module/src/debug.cpp
index 23764bc73fbff..3f6935365c1a4 100644
--- a/planning/behavior_velocity_run_out_module/src/debug.cpp
+++ b/planning/behavior_velocity_run_out_module/src/debug.cpp
@@ -73,6 +73,8 @@ visualization_msgs::msg::MarkerArray createPolygonMarkerArray(
 
 RunOutDebug::RunOutDebug(rclcpp::Node & node) : node_(node)
 {
+  accel_reason_ = AccelReason::UNKNOWN;
+
   pub_debug_values_ =
     node.create_publisher<Float32MultiArrayStamped>("~/debug/run_out/debug_values", 1);
   pub_accel_reason_ = node.create_publisher<Int32Stamped>("~/debug/run_out/accel_reason", 1);
diff --git a/planning/behavior_velocity_run_out_module/src/debug.hpp b/planning/behavior_velocity_run_out_module/src/debug.hpp
index e9b269ee437f0..fbf682279e363 100644
--- a/planning/behavior_velocity_run_out_module/src/debug.hpp
+++ b/planning/behavior_velocity_run_out_module/src/debug.hpp
@@ -86,6 +86,7 @@ class RunOutDebug
     NO_OBSTACLE = 1,
     PASS = 2,
     LOW_JERK = 3,
+    UNKNOWN = 4,
   };
 
   struct TextWithPosition