Add a todo.
diff --git a/Doc/whatsnew/3.2.rst b/Doc/whatsnew/3.2.rst
index 12f96cd..84e5ee6 100644
--- a/Doc/whatsnew/3.2.rst
+++ b/Doc/whatsnew/3.2.rst
@@ -817,6 +817,8 @@
 
   (Contributed by Raymond Hettinger.)
 
+.. XXX threading.py and Barrier objects
+
 datetime
 --------