diff --git a/glib/gutils.h b/glib/gutils.h
index 46c372ce2..bb4da8055 100644
--- a/glib/gutils.h
+++ b/glib/gutils.h
@@ -287,7 +287,7 @@ void	g_atexit		(GVoidFunc    func);
  * wants the function to be called when it *itself* exits (or is
  * detached, in case the caller, too, is a DLL).
  */
-#if defined(__MINGW_H) && !defined(_STDLIB_H_)
+#if (defined(__MINGW_H) && !defined(_STDLIB_H_)) || (defined(_MSC_VER) && !defined(_INC_STDLIB))
 int atexit (void (*)(void));
 #endif
 #define g_atexit(func) atexit(func)