diff --git a/homeassistant/components/sensor/mqtt.py b/homeassistant/components/sensor/mqtt.py
index 1af8614a7dc..b6c7a7b4ea1 100644
--- a/homeassistant/components/sensor/mqtt.py
+++ b/homeassistant/components/sensor/mqtt.py
@@ -4,9 +4,9 @@ homeassistant.components.sensor.mqtt
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 Allows to configure a MQTT sensor.
 
-This generic sensor implementation uses the MQTT message payload 
+This generic sensor implementation uses the MQTT message payload
 as the sensor value. If messages in this state_topic are published
-with RETAIN flag, the sensor will receive an instant update with 
+with RETAIN flag, the sensor will receive an instant update with
 last known value. Otherwise, the initial state will be undefined.
 
 sensor: