diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index c2db4018ba40..00921e4d43b5 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -2393,7 +2393,8 @@ static void __ip6_rt_update_pmtu(struct dst_entry *dst, const struct sock *sk,
 	if (confirm_neigh)
 		dst_confirm_neigh(dst, daddr);
 
-	mtu = max_t(u32, mtu, IPV6_MIN_MTU);
+	if (mtu < IPV6_MIN_MTU)
+		return;
 	if (mtu >= dst_mtu(dst))
 		return;