diff --git a/homeassistant/components/light/mqtt.py b/homeassistant/components/light/mqtt.py
index f7e334b7cf7..f677a96dbba 100644
--- a/homeassistant/components/light/mqtt.py
+++ b/homeassistant/components/light/mqtt.py
@@ -209,6 +209,7 @@ class MqttLight(Light):
 
     @property
     def color_temp(self):
+        """Return the color temperature in mired."""
         return self._color_temp
 
     @property