diff --git a/source/_docs/mqtt/discovery.markdown b/source/_docs/mqtt/discovery.markdown
index 12b7af27939..6f20daddfc1 100644
--- a/source/_docs/mqtt/discovery.markdown
+++ b/source/_docs/mqtt/discovery.markdown
@@ -44,12 +44,12 @@ A motion detection device which can be represented by a [binary sensor](/compone
 
 - Configuration topic: `homeassistant/binary_sensor/garden/config`
 - State topic: `homeassistant/binary_sensor/garden/state`
-- Payload:  `{"name": "garden", "sensor_class": "motion"}`
+- Payload:  `{"name": "garden", "device_class": "motion"}`
 
 To create a new sensor manually. For more details please refer to the [MQTT testing section](/component/mqtt_testing).
 
 ```bash
-$ mosquitto_pub -h 127.0.0.1 -p 1883 -t "homeassistant/binary_sensor/garden/config" -m '{"name": "garden", "sensor_class": "motion"}'
+$ mosquitto_pub -h 127.0.0.1 -p 1883 -t "homeassistant/binary_sensor/garden/config" -m '{"name": "garden", "device_class": "motion"}'
 ```
 Update the state.