diff --git a/Misc/NEWS b/Misc/NEWS
index 57a9bd9..2e9e47d 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -137,6 +137,9 @@
 Library
 -------
 
+- Issue #3997: zipfiles generated with more than 65536 files could not be
+  opened with other applications.
+
 - Issue #1162154: inspect.getmembers() now skips attributes that raise
   AttributeError, e.g. a __slots__ attribute which has not been set.