diff --git a/homeassistant/components/hdmi_cec/__init__.py b/homeassistant/components/hdmi_cec/__init__.py
index 47bd8d160c6..9dfd68d4a4f 100644
--- a/homeassistant/components/hdmi_cec/__init__.py
+++ b/homeassistant/components/hdmi_cec/__init__.py
@@ -1,9 +1,10 @@
 """Support for HDMI CEC."""
 from __future__ import annotations
 
-from functools import partial, reduce
+from functools import reduce
 import logging
 import multiprocessing
+from typing import Any
 
 from pycec.cec import CecAdapter
 from pycec.commands import CecCommand, KeyPressCommand, KeyReleaseCommand
@@ -41,7 +42,7 @@ from homeassistant.const import (
     STATE_PLAYING,
     STATE_UNAVAILABLE,
 )
-from homeassistant.core import HomeAssistant
+from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers import discovery, event
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.entity import Entity
@@ -222,9 +223,12 @@ def setup(hass: HomeAssistant, base_config: ConfigType) -> bool:  # noqa: C901
             hass.bus.fire(EVENT_HDMI_CEC_UNAVAILABLE)
             adapter.init()
 
-    hdmi_network.set_initialized_callback(
-        partial(event.async_call_later, hass, WATCHDOG_INTERVAL, _adapter_watchdog)
-    )
+    @callback
+    def _async_initialized_callback(*_: Any):
+        """Add watchdog on initialization."""
+        return event.async_call_later(hass, WATCHDOG_INTERVAL, _adapter_watchdog)
+
+    hdmi_network.set_initialized_callback(_async_initialized_callback)
 
     def _volume(call):
         """Increase/decrease volume and mute/unmute system."""