diff --git a/source/_addons/mosquitto.markdown b/source/_addons/mosquitto.markdown
index e56242f703c..6dbf54510e8 100644
--- a/source/_addons/mosquitto.markdown
+++ b/source/_addons/mosquitto.markdown
@@ -23,7 +23,7 @@ Set up [Mosquitto](https://mosquitto.org/) as MQTT broker.
 
 <div class='warning note'>
 
-Since version 4.1 of the addon, an explicit ACL definition is now required, [see these instructions](https://www.home-assistant.io/addons/mosquitto/#access-control-lists-acls).
+Since version 4.1 of the addon, an explicit ACL definition is now required if you plan to use legacy logins and `"anonymous": true` [see these instructions](https://www.home-assistant.io/addons/mosquitto/#access-control-lists-acls).
 
 </div>