diff --git a/homeassistant/components/knx/climate.py b/homeassistant/components/knx/climate.py
index af58dd6ef4d..2c0153c5d2b 100644
--- a/homeassistant/components/knx/climate.py
+++ b/homeassistant/components/knx/climate.py
@@ -427,7 +427,7 @@ class KNXClimate(KnxYamlEntity, ClimateEntity):
             self._device.mode.xknx.devices.async_remove(self._device.mode)
         await super().async_will_remove_from_hass()
 
-    def after_update_callback(self, _device: XknxDevice) -> None:
+    def after_update_callback(self, device: XknxDevice) -> None:
         """Call after device was updated."""
         if self._device.mode is not None and self._device.mode.supports_controller_mode:
             hvac_mode = CONTROLLER_MODES.get(
@@ -435,4 +435,4 @@ class KNXClimate(KnxYamlEntity, ClimateEntity):
             )
             if hvac_mode is not HVACMode.OFF:
                 self._last_hvac_mode = hvac_mode
-        super().after_update_callback(_device)
+        super().after_update_callback(device)
diff --git a/homeassistant/components/knx/entity.py b/homeassistant/components/knx/entity.py
index 6574e5d5860..a042c2b4c6b 100644
--- a/homeassistant/components/knx/entity.py
+++ b/homeassistant/components/knx/entity.py
@@ -69,7 +69,7 @@ class _KnxEntityBase(Entity):
         """Request a state update from KNX bus."""
         await self._device.sync()
 
-    def after_update_callback(self, _device: XknxDevice) -> None:
+    def after_update_callback(self, device: XknxDevice) -> None:
         """Call after device was updated."""
         self.async_write_ha_state()
 
diff --git a/homeassistant/components/knx/sensor.py b/homeassistant/components/knx/sensor.py
index ed265db4ac7..fa4911aa4b7 100644
--- a/homeassistant/components/knx/sensor.py
+++ b/homeassistant/components/knx/sensor.py
@@ -211,7 +211,7 @@ class KNXSystemSensor(SensorEntity):
             return True
         return self.knx.xknx.connection_manager.state is XknxConnectionState.CONNECTED
 
-    def after_update_callback(self, _: XknxConnectionState) -> None:
+    def after_update_callback(self, device: XknxConnectionState) -> None:
         """Call after device was updated."""
         self.async_write_ha_state()