diff --git a/nilmdb/utils/serializer.py b/nilmdb/utils/serializer.py
index 3f74180..50d750e 100644
--- a/nilmdb/utils/serializer.py
+++ b/nilmdb/utils/serializer.py
@@ -82,8 +82,6 @@ def serializer_proxy(obj_or_type):
             self._thread_safe = True
 
         def __getattr__(self, key):
-            if key.startswith("_SerializerObjectProxy__"): # pragma: no cover
-                raise AttributeError
             attr = getattr(self.__object, key)
             if not callable(attr):
                 getter = SerializerCallProxy(self.__call_queue, getattr, self)