diff --git a/net/ipv6/ip6_udp_tunnel.c b/net/ipv6/ip6_udp_tunnel.c
index cbc990712cc1c00d056e254589ab98117c7bc70a..b04ed72c454247886d7d99ae5c9e36e949b48cd1 100644
--- a/net/ipv6/ip6_udp_tunnel.c
+++ b/net/ipv6/ip6_udp_tunnel.c
@@ -103,3 +103,5 @@ int udp_tunnel6_xmit_skb(struct socket *sock, struct dst_entry *dst,
 	return 0;
 }
 EXPORT_SYMBOL_GPL(udp_tunnel6_xmit_skb);
+
+MODULE_LICENSE("GPL");