diff --git a/homeassistant/components/freebox/button.py b/homeassistant/components/freebox/button.py
index 046003b209d..79e3c98b8b7 100644
--- a/homeassistant/components/freebox/button.py
+++ b/homeassistant/components/freebox/button.py
@@ -19,20 +19,13 @@ from .const import DOMAIN
 from .router import FreeboxRouter
 
 
-@dataclass(frozen=True)
-class FreeboxButtonRequiredKeysMixin:
-    """Mixin for required keys."""
+@dataclass(frozen=True, kw_only=True)
+class FreeboxButtonEntityDescription(ButtonEntityDescription):
+    """Class describing Freebox button entities."""
 
     async_press: Callable[[FreeboxRouter], Awaitable]
 
 
-@dataclass(frozen=True)
-class FreeboxButtonEntityDescription(
-    ButtonEntityDescription, FreeboxButtonRequiredKeysMixin
-):
-    """Class describing Freebox button entities."""
-
-
 BUTTON_DESCRIPTIONS: tuple[FreeboxButtonEntityDescription, ...] = (
     FreeboxButtonEntityDescription(
         key="reboot",