--- zzzz-none-000/linux-2.6.32.61/include/net/netfilter/nf_conntrack_tuple.h	2013-06-10 09:43:48.000000000 +0000
+++ virian-300e-630/linux-2.6.32.61/include/net/netfilter/nf_conntrack_tuple.h	2011-07-20 07:23:51.000000000 +0000
@@ -49,6 +49,12 @@
 	struct {
 		__be16 key;	/* GRE key is 32bit, PPtP only uses 16bit */
 	} gre;
+
+	struct {
+		__be16 spi;
+	} esp;
+
+
 };
 
 /* The manipulable part of the tuple. */
@@ -90,6 +96,12 @@
 			struct {
 				__be16 key;
 			} gre;
+		
+			struct {
+				__be16 spi;
+			} esp;
+
+
 		} u;
 
 		/* The protocol. */