diff --git a/lib/ansible/plugins/lookup/mongodb.py b/lib/ansible/plugins/lookup/mongodb.py
index 2605d4e3edd..dff4a7bbecc 100644
--- a/lib/ansible/plugins/lookup/mongodb.py
+++ b/lib/ansible/plugins/lookup/mongodb.py
@@ -89,7 +89,7 @@ EXAMPLES:
 
 from __future__ import (absolute_import, division, print_function)
 from __future__ import unicode_literals
-from ansible.module_utils.six import string_types
+from ansible.module_utils.six import string_types, integer_types
 import datetime
 
 __metaclass__ = type
@@ -139,7 +139,7 @@ class LookupModule(LookupBase):
     def convert_mongo_result_to_valid_json(self, result):
         if result is None:
             return result
-        if isinstance(result, (int, long, float, bool)):
+        if isinstance(result, integer_types + (float, bool)):
             return result
         if isinstance(result, string_types):
             return result