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Diffstat (limited to 'src/vnet/tcp/tcp_input.c')
-rw-r--r--src/vnet/tcp/tcp_input.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/vnet/tcp/tcp_input.c b/src/vnet/tcp/tcp_input.c
index 10f50fefc09..85aaa16f245 100644
--- a/src/vnet/tcp/tcp_input.c
+++ b/src/vnet/tcp/tcp_input.c
@@ -135,7 +135,8 @@ tcp_options_parse (tcp_header_t * th, tcp_options_t * to)
data = (const u8 *) (th + 1);
/* Zero out all flags but those set in SYN */
- to->flags &= (TCP_OPTS_FLAG_SACK_PERMITTED | TCP_OPTS_FLAG_WSCALE);
+ to->flags &= (TCP_OPTS_FLAG_SACK_PERMITTED | TCP_OPTS_FLAG_WSCALE
+ | TCP_OPTS_FLAG_SACK);
for (; opts_len > 0; opts_len -= opt_len, data += opt_len)
{