diff --git a/Misc/NEWS b/Misc/NEWS
index dfa1a2f..afe6211 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -30,6 +30,9 @@
 Library
 -------
 
+- Issue #3476: binary buffered reading through the new "io" library is now
+  thread-safe.
+
 - Issue #1342811: Fix leak in Tkinter.Menu.delete. Commands associated to
   menu entries were not deleted.