--- mozilla/gfx/ots/src/os2.cc	2011-03-03 12:42:31.000000000 +0100
+++ mozilla/gfx/ots/src/os2.cc-gil	2011-03-09 02:23:16.000000000 +0100
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include <cstddef>
+
 #include "os2.h"
 
 #include "head.h"