diff --git a/homeassistant/components/wallbox/number.py b/homeassistant/components/wallbox/number.py
index f09321a0849..8ae4c473299 100644
--- a/homeassistant/components/wallbox/number.py
+++ b/homeassistant/components/wallbox/number.py
@@ -39,22 +39,15 @@ def min_charging_current_value(coordinator: WallboxCoordinator) -> float:
     return 6
 
 
-@dataclass(frozen=True)
-class WallboxNumberEntityDescriptionMixin:
-    """Load entities from different handlers."""
+@dataclass(frozen=True, kw_only=True)
+class WallboxNumberEntityDescription(NumberEntityDescription):
+    """Describes Wallbox number entity."""
 
     max_value_fn: Callable[[WallboxCoordinator], float]
     min_value_fn: Callable[[WallboxCoordinator], float]
     set_value_fn: Callable[[WallboxCoordinator], Callable[[float], Awaitable[None]]]
 
 
-@dataclass(frozen=True)
-class WallboxNumberEntityDescription(
-    NumberEntityDescription, WallboxNumberEntityDescriptionMixin
-):
-    """Describes Wallbox number entity."""
-
-
 NUMBER_TYPES: dict[str, WallboxNumberEntityDescription] = {
     CHARGER_MAX_CHARGING_CURRENT_KEY: WallboxNumberEntityDescription(
         key=CHARGER_MAX_CHARGING_CURRENT_KEY,