--- zzzz-none-000/linux-2.6.32.61/include/net/flow.h	2013-06-10 09:43:48.000000000 +0000
+++ virian-300e-630/linux-2.6.32.61/include/net/flow.h	2010-09-22 09:05:41.000000000 +0000
@@ -15,6 +15,10 @@
 	int	iif;
 	__u32	mark;
 
+#ifdef CONFIG_MAPPING
+	struct sk_buff *skb;
+#endif
+
 	union {
 		struct {
 			__be32			daddr;