diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index bf407f3e20dd3bd165261a87338352f41d9153e3..e20bcf0061af6d01f7dddab0743950324e24726a 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -907,7 +907,6 @@ struct tcp_md5sig_key *tcp_md5_do_lookup(const struct sock *sk,
 {
 	const struct tcp_sock *tp = tcp_sk(sk);
 	struct tcp_md5sig_key *key;
-	unsigned int size = sizeof(struct in_addr);
 	const struct tcp_md5sig_info *md5sig;
 	__be32 mask;
 	struct tcp_md5sig_key *best_match = NULL;
@@ -918,10 +917,7 @@ struct tcp_md5sig_key *tcp_md5_do_lookup(const struct sock *sk,
 				       lockdep_sock_is_held(sk));
 	if (!md5sig)
 		return NULL;
-#if IS_ENABLED(CONFIG_IPV6)
-	if (family == AF_INET6)
-		size = sizeof(struct in6_addr);
-#endif
+
 	hlist_for_each_entry_rcu(key, &md5sig->head, node) {
 		if (key->family != family)
 			continue;