diff --git a/src/plugin/BodyROS2Item.h b/src/plugin/BodyROS2Item.h
index fd67d3c..547aa46 100644
--- a/src/plugin/BodyROS2Item.h
+++ b/src/plugin/BodyROS2Item.h
@@ -1,5 +1,5 @@
-#ifndef CNOID_ROS2_PLUGIN_BODY_ROS2_ITEM_H
-#define CNOID_ROS2_PLUGIN_BODY_ROS2_ITEM_H
+#ifndef CNOID_ROS_PLUGIN_BODY_ROS2_ITEM_H
+#define CNOID_ROS_PLUGIN_BODY_ROS2_ITEM_H
 
 #include <cnoid/Archive>
 #include <cnoid/BasicSensorSimulationHelper>
diff --git a/src/plugin/ROS2Plugin.hpp b/src/plugin/ROS2Plugin.hpp
index ac4a1bb..406d9e5 100644
--- a/src/plugin/ROS2Plugin.hpp
+++ b/src/plugin/ROS2Plugin.hpp
@@ -1,5 +1,5 @@
-#ifndef CHOREONOID_ROS2__ROS2PLUGIN_HPP_
-#define CHOREONOID_ROS2__ROS2PLUGIN_HPP_
+#ifndef CHOREONOID_ROS__ROS2PLUGIN_HPP_
+#define CHOREONOID_ROS__ROS2PLUGIN_HPP_
 
 #include <cnoid/Plugin>
 #include <rclcpp/rclcpp.hpp>
@@ -11,4 +11,4 @@ class ROS2Plugin : public cnoid::Plugin
     virtual bool initialize();
 };
 
-#endif  // CHOREONOID_ROS2__ROS2PLUGIN_HPP_
+#endif  // CHOREONOID_ROS__ROS2PLUGIN_HPP_