diff --git a/jedi/builtin.py b/jedi/builtin.py
index 87060009..13cd7da1 100644
--- a/jedi/builtin.py
+++ b/jedi/builtin.py
@@ -178,7 +178,7 @@ class Parser(CachedModule):
             return {}
         else:
             mixin_dct = process_code(f.read())
-            if is_py3k and self.name == _Builtin.name:
+            if is_py3k and self.name == Builtin.name:
                 # in the case of Py3k xrange is now range
                 mixin_dct['range'] = mixin_dct['xrange']
             return mixin_dct