diff --git a/homeassistant/components/bluetooth/passive_update_processor.py b/homeassistant/components/bluetooth/passive_update_processor.py
index eeccf081b55cc0..601f78d4c8d190 100644
--- a/homeassistant/components/bluetooth/passive_update_processor.py
+++ b/homeassistant/components/bluetooth/passive_update_processor.py
@@ -93,7 +93,10 @@ def deserialize_entity_description(
     descriptions_class: type[EntityDescription], data: dict[str, Any]
 ) -> EntityDescription:
     """Deserialize an entity description."""
+    # pylint: disable=protected-access
     result: dict[str, Any] = {}
+    if hasattr(descriptions_class, "_dataclass"):
+        descriptions_class = descriptions_class._dataclass
     for field in cached_fields(descriptions_class):
         field_name = field.name
         # It would be nice if field.type returned the actual