diff --git a/Misc/NEWS b/Misc/NEWS
index 15f7f25..4a2ff93 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -37,6 +37,9 @@
 Library
 -------
 
+- Issue #11116: any error during addition of a message to a mailbox now causes
+  a rollback, instead of leaving the mailbox partially modified.
+
 - Issue #8275: Fix passing of callback arguments with ctypes under Win64.
   Patch by Stan Mihai.