diff --git a/homeassistant/components/sensor/ecobee.py b/homeassistant/components/sensor/ecobee.py
index 0b55c179139..ca22fb44a75 100644
--- a/homeassistant/components/sensor/ecobee.py
+++ b/homeassistant/components/sensor/ecobee.py
@@ -63,6 +63,11 @@ class EcobeeSensor(Entity):
         """ Returns the state of the device. """
         return self._state
 
+    @property
+    def unique_id(self):
+        """Unique id of this sensor."""
+        return "sensor_ecobee_{}_{}".format(self.type, self.index)
+
     @property
     def unit_of_measurement(self):
         """ Unit of measurement this sensor expresses itself in. """