diff --git a/code/ryzom/common/src/game_share/stdpch.h b/code/ryzom/common/src/game_share/stdpch.h
index 88c1ed7f7..18f6f00e0 100644
--- a/code/ryzom/common/src/game_share/stdpch.h
+++ b/code/ryzom/common/src/game_share/stdpch.h
@@ -18,10 +18,10 @@
 
 #include <stdlib.h>
 #include <stdio.h>
+#include <stddef.h>
 #include <math.h>
 #include <time.h>
 #include <assert.h>
-#include <cstddef>
 
 #include <string>
 #include <vector>