diff --git a/mongoengine/base.py b/mongoengine/base.py
index 99a71dce..05271b72 100644
--- a/mongoengine/base.py
+++ b/mongoengine/base.py
@@ -617,6 +617,8 @@ class TopLevelDocumentMetaclass(DocumentMetaclass):
                     base_meta['queryset_class'] = base._meta['queryset_class']
             try:
                 base_meta['objects'] = base.__getattribute__(base, 'objects')
+            except TypeError:
+                pass
             except AttributeError:
                 pass