diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 8b48512..addd856 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -761,6 +761,9 @@ do_udp_sendmsg:
 	}
 
 	if (!fl.oif)
+		fl.oif = np->sticky_pktinfo.ipi6_ifindex;
+
+	if (!fl.oif)
 		fl.oif = sk->sk_bound_dev_if;
 
 	if (msg->msg_controllen) {