diff --git a/homeassistant/components/zamg/sensor.py b/homeassistant/components/zamg/sensor.py
index 4e1a1d49bec..7c7f5fd6c16 100644
--- a/homeassistant/components/zamg/sensor.py
+++ b/homeassistant/components/zamg/sensor.py
@@ -38,18 +38,13 @@ from .const import (
 from .coordinator import ZamgDataUpdateCoordinator
 
 
-@dataclass(frozen=True)
-class ZamgRequiredKeysMixin:
-    """Mixin for required keys."""
+@dataclass(frozen=True, kw_only=True)
+class ZamgSensorEntityDescription(SensorEntityDescription):
+    """Describes Zamg sensor entity."""
 
     para_name: str
 
 
-@dataclass(frozen=True)
-class ZamgSensorEntityDescription(SensorEntityDescription, ZamgRequiredKeysMixin):
-    """Describes Zamg sensor entity."""
-
-
 SENSOR_TYPES: tuple[ZamgSensorEntityDescription, ...] = (
     ZamgSensorEntityDescription(
         key="pressure",