diff --git a/homeassistant/components/tellduslive/sensor.py b/homeassistant/components/tellduslive/sensor.py
index 06b505d9574..e15f89888b1 100644
--- a/homeassistant/components/tellduslive/sensor.py
+++ b/homeassistant/components/tellduslive/sensor.py
@@ -142,7 +142,6 @@ class TelldusLiveSensor(TelldusLiveEntity, SensorEntity):
     def __init__(self, client, device_id):
         """Initialize TelldusLiveSensor."""
         super().__init__(client, device_id)
-        self._attr_unique_id = "{}-{}-{}".format(*device_id)
         if desc := SENSOR_TYPES.get(self._type):
             self.entity_description = desc
         else:
@@ -190,3 +189,8 @@ class TelldusLiveSensor(TelldusLiveEntity, SensorEntity):
         if self._type == SENSOR_TYPE_LUMINANCE:
             return self._value_as_luminance
         return self._value
+
+    @property
+    def unique_id(self) -> str:
+        """Return a unique ID."""
+        return "{}-{}-{}".format(*self._id)