diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 1e3bd39..8cbdcc9 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -757,7 +757,7 @@
 	if (final_p)
 		ipv6_addr_copy(&fl.fl6_dst, final_p);
 
-	if ((err = __xfrm_lookup(&dst, &fl, sk, 1)) < 0) {
+	if ((err = __xfrm_lookup(&dst, &fl, sk, XFRM_LOOKUP_WAIT)) < 0) {
 		if (err == -EREMOTE)
 			err = ip6_dst_blackhole(sk, &dst, &fl);
 		if (err < 0)