diff --git a/homeassistant/components/fritz/button.py b/homeassistant/components/fritz/button.py
index 7c7dcaba80f..d56350dd1d0 100644
--- a/homeassistant/components/fritz/button.py
+++ b/homeassistant/components/fritz/button.py
@@ -24,18 +24,13 @@ from .const import DOMAIN
 _LOGGER = logging.getLogger(__name__)
 
 
-@dataclass(frozen=True)
-class FritzButtonDescriptionMixin:
-    """Mixin to describe a Button entity."""
+@dataclass(frozen=True, kw_only=True)
+class FritzButtonDescription(ButtonEntityDescription):
+    """Class to describe a Button entity."""
 
     press_action: Callable
 
 
-@dataclass(frozen=True)
-class FritzButtonDescription(ButtonEntityDescription, FritzButtonDescriptionMixin):
-    """Class to describe a Button entity."""
-
-
 BUTTONS: Final = [
     FritzButtonDescription(
         key="firmware_update",