diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index fb075d9545b9eccf2e63c7b5727734e79d715d44..27430d6e1a99ca9238eefb7076b41af150b926a1 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -2745,7 +2745,8 @@ 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;