diff --git a/aenum/_common.py b/aenum/_common.py
index 7eaee11..d978ee9 100644
--- a/aenum/_common.py
+++ b/aenum/_common.py
@@ -76,7 +76,7 @@
 baseint = baseinteger
 
 try:
-    NoneType
+    NoneType = NoneType
 except NameError:
     NoneType = type(None)