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-rw-r--r--net/ipv4/ip_gre.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index cb4a0f4bd5e5..82c11dd10a62 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -951,7 +951,7 @@ static int ipgre_tunnel_bind_dev(struct net_device *dev)
addend += 4;
}
dev->needed_headroom = addend + hlen;
- mtu -= dev->hard_header_len - addend;
+ mtu -= dev->hard_header_len + addend;
if (mtu < 68)
mtu = 68;