diff --git a/sys/netinet/tcp_timewait.c b/sys/netinet/tcp_timewait.c
index b0ab3e02c61..f0ab7710033 100644
--- a/sys/netinet/tcp_timewait.c
+++ b/sys/netinet/tcp_timewait.c
@@ -324,9 +324,6 @@ tcp_twstart(struct tcpcb *tp)
 	tw->snd_nxt = tp->snd_nxt;
 	tw->t_port = tp->t_port;
 	tw->rcv_nxt = tp->rcv_nxt;
-	tw->iss     = tp->iss;
-	tw->irs     = tp->irs;
-	tw->t_starttime = tp->t_starttime;
 	tw->tw_time = 0;
 
 /* XXX
diff --git a/sys/netinet/tcp_var.h b/sys/netinet/tcp_var.h
index 57d7352b8f1..6b121a7fd31 100644
--- a/sys/netinet/tcp_var.h
+++ b/sys/netinet/tcp_var.h
@@ -528,18 +528,13 @@ struct tcptw {
 		t_unused:16;
 	tcp_seq		snd_nxt;
 	tcp_seq		rcv_nxt;
-	tcp_seq		iss;
-	tcp_seq		irs;
 	u_short		last_win;	/* cached window value */
 	short		tw_so_options;	/* copy of so_options */
 	struct ucred	*tw_cred;	/* user credentials */
 	u_int32_t	t_recent;
 	u_int32_t	ts_offset;	/* our timestamp offset */
-	u_int		t_starttime;
 	int		tw_time;
 	TAILQ_ENTRY(tcptw) tw_2msl;
-	void		*tw_pspare;	/* TCP_SIGNATURE */
-	u_int		*tw_spare;	/* TCP_SIGNATURE */
 };
 
 #define	intotcpcb(ip)	((struct tcpcb *)(ip)->inp_ppcb)