diff --git a/xc/config/cf/vnc.def b/xc/config/cf/vnc.def
index 255c8f4..fe7eaa9 100644
--- a/xc/config/cf/vnc.def
+++ b/xc/config/cf/vnc.def
@@ -5,7 +5,8 @@
 #define BuildPexExt NO
 #define BuildNls NO
 #define BuildXIE NO
-#define BuildGlxExt NO
+#define BuildGlxExt YES
+#define GlxBuiltInXMesa YES
 #define XnestServer YES
 #define XF86Server NO
 #define XprtServer NO