diff --git a/src/realtime_clock.cpp b/src/realtime_clock.cpp
index 93f16634..d794fc31 100644
--- a/src/realtime_clock.cpp
+++ b/src/realtime_clock.cpp
@@ -35,7 +35,7 @@
  * Author: Wim Meeussen
  */
 
-#include "realtime_tools/realtime_clock.h"
+#include "realtime_tools/realtime_clock.hpp"
 
 #include <chrono>