News about the repaired memory leak in defaultdict.
diff --git a/Misc/NEWS b/Misc/NEWS
index 51de474..294b159 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -106,6 +106,9 @@
 Extension Modules
 -----------------
 
+- The ``__reduce__()`` method of the new ``collections.defaultdict`` had
+  a memory leak, affecting pickles and deep copies.
+
 - Bug #1471938: Fix curses module build problem on Solaris 8; patch by
   Paul Eggert.