1 files changed, 3 insertions, 1 deletions

diff --git a/net/l2tp/l2tp_netlink.c b/net/l2tp/l2tp_netlink.c
index 4cfd722e9153..bd7387adea9e 100644
--- a/net/l2tp/l2tp_netlink.c
+++ b/net/l2tp/l2tp_netlink.c
@@ -578,8 +578,10 @@ static int l2tp_nl_cmd_session_modify(struct sk_buff *skb, struct genl_info *inf
         if (info->attrs[L2TP_ATTR_RECV_SEQ])
                 session->recv_seq = nla_get_u8(info->attrs[L2TP_ATTR_RECV_SEQ]);
 
-        if (info->attrs[L2TP_ATTR_SEND_SEQ])
+        if (info->attrs[L2TP_ATTR_SEND_SEQ]) {
                 session->send_seq = nla_get_u8(info->attrs[L2TP_ATTR_SEND_SEQ]);
+                l2tp_session_set_header_len(session, session->tunnel->version);
+        }
 
         if (info->attrs[L2TP_ATTR_LNS_MODE])
                 session->lns_mode = nla_get_u8(info->attrs[L2TP_ATTR_LNS_MODE]);