diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 1fbb4dfbb191bb82b7a8b32c11e74824533b08b2..5e2c34c0ac973643f2fdffee0e9c2d1214922425 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -1421,6 +1421,7 @@ static void ipip6_tunnel_setup(struct net_device *dev)
 	int t_hlen = tunnel->hlen + sizeof(struct iphdr);
 
 	dev->netdev_ops		= &ipip6_netdev_ops;
+	dev->header_ops		= &ip_tunnel_header_ops;
 	dev->needs_free_netdev	= true;
 	dev->priv_destructor	= ipip6_dev_free;