diff --git a/homeassistant/components/comfoconnect/sensor.py b/homeassistant/components/comfoconnect/sensor.py
index 421643f5ced..be0616468a1 100644
--- a/homeassistant/components/comfoconnect/sensor.py
+++ b/homeassistant/components/comfoconnect/sensor.py
@@ -79,19 +79,11 @@ ATTR_SUPPLY_TEMPERATURE = "supply_temperature"
 _LOGGER = logging.getLogger(__name__)
 
 
-@dataclass(frozen=True)
-class ComfoconnectRequiredKeysMixin:
-    """Mixin for required keys."""
-
-    sensor_id: int
-
-
-@dataclass(frozen=True)
-class ComfoconnectSensorEntityDescription(
-    SensorEntityDescription, ComfoconnectRequiredKeysMixin
-):
+@dataclass(frozen=True, kw_only=True)
+class ComfoconnectSensorEntityDescription(SensorEntityDescription):
     """Describes Comfoconnect sensor entity."""
 
+    sensor_id: int
     multiplier: float = 1