diff --git a/Misc/NEWS b/Misc/NEWS
index ec8b72e..170d522 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -25,6 +25,9 @@
 Library
 -------
 
+- Issue #11700: mailbox proxy object close methods can now be called multiple
+  times without error.
+
 - Issue #11767: Correct file descriptor leak in mailbox's __getitem__ method.
 
 - Issue #12133: AbstractHTTPHandler.do_open() of urllib.request closes the HTTP