diff --git a/README.markdown b/README.markdown
index 8c6edec844..eb378ac0cd 100644
--- a/README.markdown
+++ b/README.markdown
@@ -8156,7 +8156,7 @@ tcpsock:getfd
 
 **context:** *rewrite_by_lua*, access_by_lua*, content_by_lua*, ngx.timer.*, ssl_certificate_by_lua*, ssl_session_fetch_by_lua*, ssl_client_hello_by_lua**
 
-Get the file describer of the current tcp socket.
+Get the file descriptor of the current tcp socket.
 
 This method was first introduced in the `v0.10.29` release.