diff --git a/lightkube/codecs.py b/lightkube/codecs.py
index 96e68ad..6fd792e 100644
--- a/lightkube/codecs.py
+++ b/lightkube/codecs.py
@@ -92,7 +92,7 @@ def _flatten(objects: Iterator) -> List[AnyResource]:
         for obj in objects:
             if obj is None:
                 continue
-            if isinstance(obj, Mapping) and obj.get("kind").endswith("List"):
+            if isinstance(obj, Mapping) and obj.get("kind", "").endswith("List"):
                 resources += _flatten(obj.get("items") or [])
             else:
                 res = from_dict(obj)