diff --git a/source/_integrations/switch.mqtt.markdown b/source/_integrations/switch.mqtt.markdown
index 7b3ca3be0b9..910dc4d7b80 100644
--- a/source/_integrations/switch.mqtt.markdown
+++ b/source/_integrations/switch.mqtt.markdown
@@ -135,6 +135,10 @@ state_topic:
   description: The MQTT topic subscribed to receive state updates.
   required: false
   type: string
+unique_id:
+  description: An ID that uniquely identifies this switch device. If two switches have the same unique ID, Home Assistant will raise an exception.
+  required: false
+  type: string
 value_template:
   description: "Defines a [template](/docs/configuration/templating/#processing-incoming-data) to extract device's state from the `state_topic`. To determine the switches's state result of this template will be compared to `state_on` and `state_off`."
   required: false