diff --git a/GaudiKernel/GaudiKernel/EventIDBase.h b/GaudiKernel/GaudiKernel/EventIDBase.h
index 0e466fdb979c7032569d5f24c666b6ebd851a276..c79166cac54531dcca745c559e2e8ee79d2eef18 100644
--- a/GaudiKernel/GaudiKernel/EventIDBase.h
+++ b/GaudiKernel/GaudiKernel/EventIDBase.h
@@ -13,9 +13,9 @@
  *
  */
 
+#include <cstdint>
 #include <iomanip>
 #include <iostream>
-#include <stdint.h>
 #include <tuple>
 
 #include "GaudiKernel/compose.h"