diff --git a/source/_docs/mqtt/service.markdown b/source/_docs/mqtt/service.markdown
index 218a5a8ec1d..ce24e1011ab 100644
--- a/source/_docs/mqtt/service.markdown
+++ b/source/_docs/mqtt/service.markdown
@@ -55,7 +55,7 @@ Listen to the specified topic matcher and dumps all received messages within a s
 | Service data attribute | Optional | Description |
 | ---------------------- | -------- | ----------- |
 | `topic` | no | Topic to dump. Can contain a wildcard (`#` or `+`).
-| `duration` | no | Duration in seconds that we will listen for messages. Default is 5 seconds.
+| `duration` | yes | Duration in seconds that we will listen for messages. Default is 5 seconds.
 
 ```yaml
 topic: openzwave/#