diff --git a/include/net/timewait_sock.h b/include/net/timewait_sock.h
index 74d2b463cc95..62b3e9f2aed4 100644
--- a/include/net/timewait_sock.h
+++ b/include/net/timewait_sock.h
@@ -15,18 +15,9 @@ struct timewait_sock_ops {
 	struct kmem_cache	*twsk_slab;
 	char		*twsk_slab_name;
 	unsigned int	twsk_obj_size;
-	int		(*twsk_unique)(struct sock *sk,
-				       struct sock *sktw, void *twp);
 	void		(*twsk_destructor)(struct sock *sk);
 };
 
-static inline int twsk_unique(struct sock *sk, struct sock *sktw, void *twp)
-{
-	if (sk->sk_prot->twsk_prot->twsk_unique != NULL)
-		return sk->sk_prot->twsk_prot->twsk_unique(sk, sktw, twp);
-	return 0;
-}
-
 static inline void twsk_destructor(struct sock *sk)
 {
 	if (sk->sk_prot->twsk_prot->twsk_destructor != NULL)
diff --git a/net/ipv4/inet_hashtables.c b/net/ipv4/inet_hashtables.c
index cf88eca5f1b4..48d0d494185b 100644
--- a/net/ipv4/inet_hashtables.c
+++ b/net/ipv4/inet_hashtables.c
@@ -565,7 +565,8 @@ static int __inet_check_established(struct inet_timewait_death_row *death_row,
 		if (likely(inet_match(net, sk2, acookie, ports, dif, sdif))) {
 			if (sk2->sk_state == TCP_TIME_WAIT) {
 				tw = inet_twsk(sk2);
-				if (twsk_unique(sk, sk2, twp))
+				if (sk->sk_protocol == IPPROTO_TCP &&
+				    tcp_twsk_unique(sk, sk2, twp))
 					break;
 			}
 			goto not_unique;
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 95e3d28b83b8..108a438dc247 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -2437,7 +2437,6 @@ do_time_wait:
 
 static struct timewait_sock_ops tcp_timewait_sock_ops = {
 	.twsk_obj_size	= sizeof(struct tcp_timewait_sock),
-	.twsk_unique	= tcp_twsk_unique,
 	.twsk_destructor= tcp_twsk_destructor,
 };
 
diff --git a/net/ipv6/inet6_hashtables.c b/net/ipv6/inet6_hashtables.c
index 2e81383b663b..6db71bb1cd30 100644
--- a/net/ipv6/inet6_hashtables.c
+++ b/net/ipv6/inet6_hashtables.c
@@ -21,6 +21,7 @@
 #include <net/secure_seq.h>
 #include <net/ip.h>
 #include <net/sock_reuseport.h>
+#include <net/tcp.h>
 
 u32 inet6_ehashfn(const struct net *net,
 		  const struct in6_addr *laddr, const u16 lport,
@@ -289,7 +290,8 @@ static int __inet6_check_established(struct inet_timewait_death_row *death_row,
 				       dif, sdif))) {
 			if (sk2->sk_state == TCP_TIME_WAIT) {
 				tw = inet_twsk(sk2);
-				if (twsk_unique(sk, sk2, twp))
+				if (sk->sk_protocol == IPPROTO_TCP &&
+				    tcp_twsk_unique(sk, sk2, twp))
 					break;
 			}
 			goto not_unique;
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 37201c4fb393..7f6693e794bd 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -2049,7 +2049,6 @@ void tcp_v6_early_demux(struct sk_buff *skb)
 
 static struct timewait_sock_ops tcp6_timewait_sock_ops = {
 	.twsk_obj_size	= sizeof(struct tcp6_timewait_sock),
-	.twsk_unique	= tcp_twsk_unique,
 	.twsk_destructor = tcp_twsk_destructor,
 };