diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 7ff52628a73f2048204eb38a40264d04f9c58e2f..2ada033406de08b6e471287867001a63a33336e2 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -1297,6 +1297,7 @@ static int ipgre_fb_tunnel_init(struct net_device *dev)
 static struct net_protocol ipgre_protocol = {
 	.handler	=	ipgre_rcv,
 	.err_handler	=	ipgre_err,
+	.netns_ok	=	1,
 };
 
 static void ipgre_destroy_tunnels(struct ipgre_net *ign)