diff --git a/src/libcharon/plugins/updown/updown_listener.c b/src/libcharon/plugins/updown/updown_listener.c
index 95d5cded4..c7ee7bf87 100644
--- a/src/libcharon/plugins/updown/updown_listener.c
+++ b/src/libcharon/plugins/updown/updown_listener.c
@@ -289,7 +289,9 @@ static void invoke_once(private_updown_listener_t *this, ike_sa_t *ike_sa,
 			 config->get_name(config));
 	if (up)
 	{
-		if (charon->kernel->get_interface(charon->kernel, me, &iface))
+		host = charon->kernel->get_nexthop(charon->kernel, other, -1, me,
+										   &iface);
+		if (host && iface)
 		{
 			cache_iface(this, child_sa->get_reqid(child_sa), iface);
 		}
@@ -297,6 +299,7 @@ static void invoke_once(private_updown_listener_t *this, ike_sa_t *ike_sa,
 		{
 			iface = NULL;
 		}
+		DESTROY_IF(host);
 	}
 	else
 	{