--- a/include/dos_inc.h	2010-05-10 19:43:54.000000000 +0200
+++ b/include/dos_inc.h	2011-03-16 09:46:24.430008904 +0100
@@ -27,6 +27,7 @@
 #ifndef DOSBOX_MEM_H
 #include "mem.h"
 #endif
+#include <stddef.h>
 
 #ifdef _MSC_VER
 #pragma pack (1)