diff --git a/homeassistant/components/whirlpool/sensor.py b/homeassistant/components/whirlpool/sensor.py
index ff92a059e96..a710dfb81a8 100644
--- a/homeassistant/components/whirlpool/sensor.py
+++ b/homeassistant/components/whirlpool/sensor.py
@@ -90,20 +90,13 @@ def washer_state(washer: WasherDryer) -> str | None:
     return MACHINE_STATE.get(machine_state, None)
 
 
-@dataclass(frozen=True)
-class WhirlpoolSensorEntityDescriptionMixin:
-    """Mixin for required keys."""
+@dataclass(frozen=True, kw_only=True)
+class WhirlpoolSensorEntityDescription(SensorEntityDescription):
+    """Describes Whirlpool Washer sensor entity."""
 
     value_fn: Callable
 
 
-@dataclass(frozen=True)
-class WhirlpoolSensorEntityDescription(
-    SensorEntityDescription, WhirlpoolSensorEntityDescriptionMixin
-):
-    """Describes Whirlpool Washer sensor entity."""
-
-
 SENSORS: tuple[WhirlpoolSensorEntityDescription, ...] = (
     WhirlpoolSensorEntityDescription(
         key="state",