diff --git a/example_12/controllers/include/passthrough_controller/passthrough_controller.hpp b/example_12/controllers/include/passthrough_controller/passthrough_controller.hpp
index 829aa7101..c90a894c9 100644
--- a/example_12/controllers/include/passthrough_controller/passthrough_controller.hpp
+++ b/example_12/controllers/include/passthrough_controller/passthrough_controller.hpp
@@ -22,7 +22,7 @@
 #include <vector>
 
 #include "controller_interface/chainable_controller_interface.hpp"
-#include "realtime_tools/realtime_buffer.h"
+#include "realtime_tools/realtime_buffer.hpp"
 #include "std_msgs/msg/float64_multi_array.hpp"
 // auto-generated by generate_parameter_library
 #include "passthrough_controller_parameters.hpp"
diff --git a/example_14/hardware/include/ros2_control_demo_example_14/rrbot_sensor_for_position_feedback.hpp b/example_14/hardware/include/ros2_control_demo_example_14/rrbot_sensor_for_position_feedback.hpp
index 9716755d2..0fe41d604 100644
--- a/example_14/hardware/include/ros2_control_demo_example_14/rrbot_sensor_for_position_feedback.hpp
+++ b/example_14/hardware/include/ros2_control_demo_example_14/rrbot_sensor_for_position_feedback.hpp
@@ -34,7 +34,7 @@
 #include "rclcpp/logger.hpp"
 #include "rclcpp/macros.hpp"
 #include "rclcpp/time.hpp"
-#include "realtime_tools/realtime_buffer.h"
+#include "realtime_tools/realtime_buffer.hpp"
 
 namespace ros2_control_demo_example_14
 {
diff --git a/example_7/controller/include/ros2_control_demo_example_7/r6bot_controller.hpp b/example_7/controller/include/ros2_control_demo_example_7/r6bot_controller.hpp
index b01cd9592..ee8c24f96 100644
--- a/example_7/controller/include/ros2_control_demo_example_7/r6bot_controller.hpp
+++ b/example_7/controller/include/ros2_control_demo_example_7/r6bot_controller.hpp
@@ -33,7 +33,7 @@
 #include "rclcpp/timer.hpp"
 #include "rclcpp_lifecycle/lifecycle_publisher.hpp"
 #include "rclcpp_lifecycle/node_interfaces/lifecycle_node_interface.hpp"
-#include "realtime_tools/realtime_buffer.h"
+#include "realtime_tools/realtime_buffer.hpp"
 #include "trajectory_msgs/msg/joint_trajectory.hpp"
 #include "trajectory_msgs/msg/joint_trajectory_point.hpp"