1 files changed, 1 insertions, 0 deletions

diff --git a/include/uapi/linux/tcp.h b/include/uapi/linux/tcp.h
index c4b89a5cb7df..e962faa5ab0d 100644
--- a/include/uapi/linux/tcp.h
+++ b/include/uapi/linux/tcp.h
@@ -130,6 +130,7 @@ enum {
 #define TCPI_OPT_WSCALE         4
 #define TCPI_OPT_ECN            8 /* ECN was negociated at TCP session init */
 #define TCPI_OPT_ECN_SEEN       16 /* we received at least one packet with ECT */
+#define TCPI_OPT_SYN_DATA       32 /* SYN-ACK acked data in SYN sent or rcvd */
 
 enum tcp_ca_state {
         TCP_CA_Open = 0,