diff --git a/homeassistant/components/mqtt/discovery.py b/homeassistant/components/mqtt/discovery.py
index 342e7d121f2..0c0032ec8eb 100644
--- a/homeassistant/components/mqtt/discovery.py
+++ b/homeassistant/components/mqtt/discovery.py
@@ -113,7 +113,7 @@ async def async_start(  # noqa: C901
                         "Received message on illegal discovery topic '%s'. The topic"
                         " contains "
                         "not allowed characters. For more information see "
-                        "https://www.home-assistant.io/docs/mqtt/discovery/#discovery-topic"
+                        "https://www.home-assistant.io/integrations/mqtt/#discovery-topic"
                     ),
                     topic,
                 )