diff --git a/homeassistant/components/rflink/__init__.py b/homeassistant/components/rflink/__init__.py
index 563ecedec3d..f66aafe3753 100644
--- a/homeassistant/components/rflink/__init__.py
+++ b/homeassistant/components/rflink/__init__.py
@@ -315,7 +315,6 @@ class RflinkDevice(Entity):
     """
 
     platform = None
-    _state = None
     _available = True
 
     def __init__(
@@ -345,6 +344,7 @@ class RflinkDevice(Entity):
         self._nogroup_aliases = nogroup_aliases
         self._should_fire_event = fire_event
         self._signal_repetitions = signal_repetitions
+        self._state = None
 
     @callback
     def handle_event_callback(self, event):
diff --git a/homeassistant/components/rflink/cover.py b/homeassistant/components/rflink/cover.py
index 91e68fa0fb8..b716ec5dcb7 100644
--- a/homeassistant/components/rflink/cover.py
+++ b/homeassistant/components/rflink/cover.py
@@ -125,7 +125,9 @@ async def async_setup_platform(
 class RflinkCover(RflinkCommand, CoverEntity, RestoreEntity):
     """Rflink entity which can switch on/stop/off (eg: cover)."""
 
-    async def async_added_to_hass(self):
+    _state: bool | None
+
+    async def async_added_to_hass(self) -> None:
         """Restore RFLink cover state (OPEN/CLOSE)."""
         await super().async_added_to_hass()
         if (old_state := await self.async_get_last_state()) is not None:
@@ -142,17 +144,17 @@ class RflinkCover(RflinkCommand, CoverEntity, RestoreEntity):
             self._state = False
 
     @property
-    def should_poll(self):
+    def should_poll(self) -> bool:
         """No polling available in RFlink cover."""
         return False
 
     @property
-    def is_closed(self):
+    def is_closed(self) -> bool | None:
         """Return if the cover is closed."""
         return not self._state
 
     @property
-    def assumed_state(self):
+    def assumed_state(self) -> bool:
         """Return True because covers can be stopped midway."""
         return True