--- a/include/dos_inc.h	2011-04-28 08:46:04.505011354 +0200
+++ b/include/dos_inc.h	2011-04-28 08:46:27.104408178 +0200
@@ -21,6 +21,7 @@
 #ifndef DOSBOX_DOS_INC_H
 #define DOSBOX_DOS_INC_H
 
+#include <cstddef>
 #ifndef DOSBOX_DOS_SYSTEM_H
 #include "dos_system.h"
 #endif