diff --git a/Misc/NEWS b/Misc/NEWS
index 2ecd85b..f003c0a 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -55,6 +55,8 @@
 Library
 -------
 
+- Issue #5647: MutableSet.__iand__() no longer mutates self during iteration.
+
 - Issue #5624: Fix the _winreg module name still used in several modules.
 
 - Issue #5628: Fix io.TextIOWrapper.read() with a unreadable buffer.