--- tun.c	2017-03-08 23:19:40.117615235 +0300
+++ tun.c.new	2017-03-08 23:20:12.886749195 +0300
@@ -1919,6 +1919,8 @@
 		return -EINVAL;
 
 	tun->set_features = features;
+	tun->dev->wanted_features &= ~TUN_USER_FEATURES;
+	tun->dev->wanted_features |= features;
 	netdev_update_features(tun->dev);
 
 	return 0;