diff --git a/net/ipv6/datagram.c b/net/ipv6/datagram.c
index 9d78c907b918..9ab897ded4df 100644
--- a/net/ipv6/datagram.c
+++ b/net/ipv6/datagram.c
@@ -74,7 +74,7 @@ int ip6_datagram_dst_update(struct sock *sk, bool fix_sk_saddr)
 
 	if (np->sndflow && (np->flow_label & IPV6_FLOWLABEL_MASK)) {
 		flowlabel = fl6_sock_lookup(sk, np->flow_label);
-		if (!flowlabel)
+		if (IS_ERR(flowlabel))
 			return -EINVAL;
 	}
 	ip6_datagram_flow_key_init(&fl6, sk);