diff --git a/custom_components/localtuya/cover.py b/custom_components/localtuya/cover.py
index bda3a97..6ba9f6f 100644
--- a/custom_components/localtuya/cover.py
+++ b/custom_components/localtuya/cover.py
@@ -169,7 +169,7 @@ class TuyaDevice(CoverEntity):
     @property
     def unique_id(self):
         """Return unique device identifier."""
-        return self._device.unique_id
+        return f"local_{self._device.unique_id}"
 
     @property
     def available(self):
diff --git a/custom_components/localtuya/light.py b/custom_components/localtuya/light.py
index 75d904f..a97a882 100644
--- a/custom_components/localtuya/light.py
+++ b/custom_components/localtuya/light.py
@@ -214,7 +214,7 @@ class TuyaDevice(Light):
     @property
     def unique_id(self):
         """Return unique device identifier."""
-        return self._device.unique_id
+        return f"local_{self._device.unique_id}"
 
     @property
     def available(self):
diff --git a/custom_components/localtuya/switch.py b/custom_components/localtuya/switch.py
index b5b4584..1eb8529 100644
--- a/custom_components/localtuya/switch.py
+++ b/custom_components/localtuya/switch.py
@@ -224,7 +224,7 @@ class TuyaDevice(SwitchEntity):
     @property
     def unique_id(self):
         """Return unique device identifier."""
-        return self._device.unique_id
+        return f"local_{self._device.unique_id}"
 
     @property
     def available(self):