diff --git a/homeassistant/components/rflink/__init__.py b/homeassistant/components/rflink/__init__.py
index e703f0d09de..f5a0f0808da 100644
--- a/homeassistant/components/rflink/__init__.py
+++ b/homeassistant/components/rflink/__init__.py
@@ -6,7 +6,7 @@ from collections import defaultdict
 import logging
 
 import async_timeout
-from rflink.protocol import create_rflink_connection
+from rflink.protocol import ProtocolBase, create_rflink_connection
 from serial import SerialException
 import voluptuous as vol
 
@@ -478,12 +478,16 @@ class RflinkCommand(RflinkDevice):
 
     # Keep repetition tasks to cancel if state is changed before repetitions
     # are sent
-    _repetition_task = None
+    _repetition_task: asyncio.Task[None] | None = None
 
-    _protocol = None
+    _protocol: ProtocolBase | None = None
+
+    _wait_ack: bool | None = None
 
     @classmethod
-    def set_rflink_protocol(cls, protocol, wait_ack=None):
+    def set_rflink_protocol(
+        cls, protocol: ProtocolBase | None, wait_ack: bool | None = None
+    ) -> None:
         """Set the Rflink asyncio protocol as a class variable."""
         cls._protocol = protocol
         if wait_ack is not None: