diff --git a/etc/emqx.conf b/etc/emqx.conf
index 8b42eb682..33fa0ae9a 100644
--- a/etc/emqx.conf
+++ b/etc/emqx.conf
@@ -454,7 +454,7 @@ mqtt.max_topic_levels = 0
 ## Value: 0 | 1 | 2
 mqtt.max_qos_allowed = 2
 
-## Maximum Topic Alias, 0 means no limit.
+## Maximum Topic Alias, 0 means no topic alias supported.
 ##
 ## Value: 0-65535
 mqtt.max_topic_alias = 0