diff --git a/homeassistant/components/ipma/sensor.py b/homeassistant/components/ipma/sensor.py
index d779a7ae02a6..99e994069a59 100644
--- a/homeassistant/components/ipma/sensor.py
+++ b/homeassistant/components/ipma/sensor.py
@@ -23,18 +23,13 @@ from .entity import IPMADevice
 _LOGGER = logging.getLogger(__name__)
 
 
-@dataclass(frozen=True)
-class IPMARequiredKeysMixin:
-    """Mixin for required keys."""
+@dataclass(frozen=True, kw_only=True)
+class IPMASensorEntityDescription(SensorEntityDescription):
+    """Describes a IPMA sensor entity."""
 
     value_fn: Callable[[Location, IPMA_API], Coroutine[Location, IPMA_API, int | None]]
 
 
-@dataclass(frozen=True)
-class IPMASensorEntityDescription(SensorEntityDescription, IPMARequiredKeysMixin):
-    """Describes IPMA sensor entity."""
-
-
 async def async_retrieve_rcm(location: Location, api: IPMA_API) -> int | None:
     """Retrieve RCM."""
     fire_risk: RCM = await location.fire_risk(api)