1 files changed, 3 insertions, 2 deletions

diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 46f9d9cf7a5f..912c42f57c79 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -28,6 +28,7 @@
 #include <linux/inetdevice.h>
 #include <linux/igmp.h>
 #include <linux/netfilter_ipv4.h>
+#include <linux/if_ether.h>
 
 #include <net/sock.h>
 #include <net/ip.h>
@@ -1140,7 +1141,7 @@ static void ipgre_tunnel_setup(struct net_device *dev)
 
         dev->type               = ARPHRD_IPGRE;
         dev->hard_header_len    = LL_MAX_HEADER + sizeof(struct iphdr) + 4;
-        dev->mtu                = 1500 - sizeof(struct iphdr) - 4;
+        dev->mtu                = ETH_DATA_LEN - sizeof(struct iphdr) - 4;
         dev->flags              = IFF_NOARP;
         dev->iflink             = 0;
         dev->addr_len           = 4;
@@ -1152,7 +1153,7 @@ static int ipgre_tunnel_init(struct net_device *dev)
         struct ip_tunnel *tunnel;
         struct iphdr *iph;
         int hlen = LL_MAX_HEADER;
-        int mtu = 1500;
+        int mtu = ETH_DATA_LEN;
         int addend = sizeof(struct iphdr) + 4;
 
         tunnel = (struct ip_tunnel*)dev->priv;