Index: tcp_subr.c
===================================================================
RCS file: /cvs/src/sys/netinet/tcp_subr.c,v
retrieving revision 1.133
diff -u -p -r1.133 tcp_subr.c
--- tcp_subr.c	20 Oct 2014 03:43:40 -0000	1.133
+++ tcp_subr.c	4 Nov 2014 04:39:47 -0000
@@ -956,7 +956,7 @@ tcp_set_iss_tsm(struct tcpcb *tp)
 		uint8_t bytes[SHA512_DIGEST_LENGTH];
 		uint32_t words[2];
 	} digest;
-
+	u_int rtable = rtable_l2(tp->t_inpcb->inp_rtableid);
 
 	if (tcp_secret_init == 0) {
 		arc4random_buf(tcp_secret, sizeof(tcp_secret));
@@ -965,6 +965,7 @@ tcp_set_iss_tsm(struct tcpcb *tp)
 		tcp_secret_init = 1;
 	}
 	ctx = tcp_secret_ctx;
+	SHA512Update(&ctx, (char *)&rtable, sizeof(rtable));
 	SHA512Update(&ctx, (char *)&tp->t_inpcb->inp_lport, sizeof(u_short));
 	SHA512Update(&ctx, (char *)&tp->t_inpcb->inp_fport, sizeof(u_short));
 	if (tp->pf == AF_INET6) {