diff --git a/mongoengine/queryset/base.py b/mongoengine/queryset/base.py
index a4e64018..2c80218c 100644
--- a/mongoengine/queryset/base.py
+++ b/mongoengine/queryset/base.py
@@ -1481,7 +1481,7 @@ class BaseQuerySet(object):
         """Wrap the result in a :class:`~mongoengine.Document` object.
         """
         if self._limit == 0 or self._none:
-            return
+            raise StopIteration
 
         raw_doc = self._cursor.next()