diff --git a/etc/emqx.conf b/etc/emqx.conf
index dc91db930..ca5786320 100644
--- a/etc/emqx.conf
+++ b/etc/emqx.conf
@@ -756,7 +756,7 @@ listener.tcp.external.zone = external
 ##
 ## Value: rate,burst
 ## Unit: Bps
-listener.tcp.external.rate_limit = 1024,4096
+## listener.tcp.external.rate_limit = 1024,4096
 
 ## The access control rules for the MQTT/TCP listener.
 ##