diff --git a/glib/glibconfig.h.in b/glib/glibconfig.h.in
index e9fc6c6d2..43e1ba122 100644
--- a/glib/glibconfig.h.in
+++ b/glib/glibconfig.h.in
@@ -130,11 +130,12 @@ typedef unsigned @glib_intptr_type_define@ guintptr;
 #  undef G_HAVE_ISO_VARARGS
 #endif
 
-#define G_HAVE_GNUC_VARARGS 1
-
 #mesondefine G_HAVE_GROWING_STACK
 
-#define G_HAVE_GNUC_VISIBILITY 1
+#ifndef _MSC_VER
+# define G_HAVE_GNUC_VARARGS 1
+# define G_HAVE_GNUC_VISIBILITY 1
+#endif
 
 #if defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590)
 #define G_GNUC_INTERNAL __attribute__((visibility("hidden")))