diff --git a/hw/xfree86/common/xf86Opt.h b/hw/xfree86/common/xf86Opt.h
index 3046fbd41..e939692cd 100644
--- a/hw/xfree86/common/xf86Opt.h
+++ b/hw/xfree86/common/xf86Opt.h
@@ -1,4 +1,3 @@
-
 /*
  * Copyright (c) 1998-2003 by The XFree86 Project, Inc.
  *
@@ -30,6 +29,9 @@
 
 #ifndef _XF86_OPT_H_
 #define _XF86_OPT_H_
+
+#include <X11/Xdefs.h>
+
 #include "xf86Optionstr.h"
 
 typedef struct {