diff --git a/net/ipv4/udp_tunnel_core.c b/net/ipv4/udp_tunnel_core.c
index 494685e828563..a87defb2b1672 100644
--- a/net/ipv4/udp_tunnel_core.c
+++ b/net/ipv4/udp_tunnel_core.c
@@ -232,6 +232,7 @@ struct rtable *udp_tunnel_dst_lookup(struct sk_buff *skb,
 	fl4.fl4_dport = dport;
 	fl4.fl4_sport = sport;
 	fl4.flowi4_tos = RT_TOS(tos);
+	fl4.flowi4_flags = key->flow_flags;
 
 	rt = ip_route_output_key(net, &fl4);
 	if (IS_ERR(rt)) {