diff --git a/include/net/tcp.h b/include/net/tcp.h
index 7118668ad5344c91b2b8fca13ff5bfec6fd729ff..adfe6dbe9053aa29146318d0160b2328a5757d1e 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -196,7 +196,7 @@ extern void tcp_time_wait(struct sock *sk, int state, int timeo);
 /* TCP thin-stream limits */
 #define TCP_THIN_LINEAR_RETRIES 6       /* After 6 linear retries, do exp. backoff */
 
-/* TCP initial congestion window */
+/* TCP initial congestion window as per draft-hkchu-tcpm-initcwnd-01 */
 #define TCP_INIT_CWND		10
 
 extern struct inet_timewait_death_row tcp_death_row;