diff --git a/TCP-Fast-Open.md b/TCP-Fast-Open.md
index 73691fe..6d0bb42 100644
--- a/TCP-Fast-Open.md
+++ b/TCP-Fast-Open.md
@@ -1,4 +1,4 @@
-If both of your server and client are deployed on Linux 3.7+, you can turn on
+If both of your server and client are deployed on Linux 3.7.1 or higher, you can turn on
 fast_open for lower latency.
 
 First set `fast_open` to `true` in your config.json.