--- vcl/unx/inc/dtint.hxx	2010-11-12 10:55:51.076691980 +0000
+++ vcl/unx/inc/dtint.hxx	2010-11-12 10:56:09.867692000 +0000
@@ -36,7 +36,7 @@
 class SalDisplay;
 class AllSettings;
 
-#ifndef _XLIB_H_
+#if !defined(_XLIB_H_) && !defined(_X11_XLIB_H_)
 // forwards from X
 struct Display;
 struct XEvent;