1 files changed, 1 insertions, 0 deletions

diff --git a/include/net/tcp.h b/include/net/tcp.h
index e07878d246aa..bc7c134ec054 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -214,6 +214,7 @@ extern void tcp_time_wait(struct sock *sk, int state, int timeo);
 
 /* Bit Flags for sysctl_tcp_fastopen */
 #define TFO_CLIENT_ENABLE       1
+#define TFO_CLIENT_NO_COOKIE    4       /* Data in SYN w/o cookie option */
 
 extern struct inet_timewait_death_row tcp_death_row;