diff --git a/glib/makegalias.pl b/glib/makegalias.pl
index 1fa132f03..f7ee76965 100755
--- a/glib/makegalias.pl
+++ b/glib/makegalias.pl
@@ -11,6 +11,9 @@ print <<EOF;
 /* Generated by makegalias.pl */
 
 #ifndef DISABLE_VISIBILITY
+
+#include "glibconfig.h"
+
 #ifdef G_HAVE_GNUC_VISIBILITY
 
 EOF