diff --git a/roborock/data/code_mappings.py b/roborock/data/code_mappings.py
index 6eefd11d..f0279b33 100644
--- a/roborock/data/code_mappings.py
+++ b/roborock/data/code_mappings.py
@@ -173,8 +173,10 @@ class RoborockCategory(Enum):
     WET_DRY_VAC = "roborock.wetdryvac"
     VACUUM = "robot.vacuum.cleaner"
     WASHING_MACHINE = "roborock.wm"
+    MOWER = "roborock.mower"
     UNKNOWN = "UNKNOWN"
 
-    def __missing__(self, key):
-        _LOGGER.warning("Missing key %s from category", key)
+    @classmethod
+    def _missing_(cls, value):
+        _LOGGER.warning("Missing code %s from category", value)
         return RoborockCategory.UNKNOWN
diff --git a/tests/data/test_code_mappings.py b/tests/data/test_code_mappings.py
index c59460ac..5cd48fa2 100644
--- a/tests/data/test_code_mappings.py
+++ b/tests/data/test_code_mappings.py
@@ -4,6 +4,7 @@
 
 import pytest
 
+from roborock import HomeDataProduct, RoborockCategory
 from roborock.data.b01_q10.b01_q10_code_mappings import B01_Q10_DP
 
 
@@ -49,3 +50,18 @@ def test_invalid_from_value() -> None:
     """Test invalid from_value method."""
     with pytest.raises(ValueError, match="invalid_value is not a valid value for B01_Q10_DP"):
         B01_Q10_DP.from_value("invalid_value")
+
+
+def test_homedata_product_unknown_category():
+    """Test that HomeDataProduct can handle unknown categories."""
+    data = {
+        "id": "unknown_cat_id",
+        "name": "Unknown Device",
+        "model": "roborock.vacuum.a87",
+        "category": "roborock.random.category",
+        "schema": [],
+    }
+
+    product = HomeDataProduct.from_dict(data)
+    assert product.id == "unknown_cat_id"
+    assert product.category == RoborockCategory.UNKNOWN