diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c
index 020f74a743eedc0c00a806976a2db2fad9b6207e..14c069b59a90c50ad642c6f82569609ed7920d74 100644
--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -911,7 +911,7 @@ static netdev_tx_t ip6erspan_tunnel_xmit(struct sk_buff *skb,
 		truncate = true;
 	}
 
-	if (skb_cow_head(skb, dev->needed_headroom))
+	if (skb_cow_head(skb, dev->needed_headroom ?: t->hlen))
 		goto tx_err;
 
 	t->parms.o_flags &= ~TUNNEL_KEY;