$NetBSD: patch-ai,v 1.3 2008/03/10 12:37:12 drochner Exp $

--- utils/visual-gl.c.orig	2008-03-02 16:26:23.000000000 +0100
+++ utils/visual-gl.c
@@ -26,6 +26,7 @@
 #ifdef HAVE_GL
 # include <GL/gl.h>
 # include <GL/glx.h>
+# include <GL/glxext.h>
 #endif /* HAVE_GL */
 
 extern char *progname;