diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index a53a543fe055..52690bb3e40f 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -1446,6 +1446,7 @@ static void erspan_setup(struct net_device *dev)
 	struct ip_tunnel *t = netdev_priv(dev);
 
 	ether_setup(dev);
+	dev->max_mtu = 0;
 	dev->netdev_ops = &erspan_netdev_ops;
 	dev->priv_flags &= ~IFF_TX_SKB_SHARING;
 	dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;