diff --git a/test/test-udp-multicast-join6.c b/test/test-udp-multicast-join6.c
index fe619fec..babf61e2 100644
--- a/test/test-udp-multicast-join6.c
+++ b/test/test-udp-multicast-join6.c
@@ -116,7 +116,11 @@ TEST_IMPL(udp_multicast_join6) {
   ASSERT(r == 0);
 
   /* join the multicast channel */
+#if defined(__APPLE__)
+  r = uv_udp_set_membership(&client, "ff02::1", "::1%lo0", UV_JOIN_GROUP);
+#else
   r = uv_udp_set_membership(&client, "ff02::1", NULL, UV_JOIN_GROUP);
+#endif
   ASSERT(r == 0);
 
   r = uv_udp_recv_start(&client, alloc_cb, cl_recv_cb);