diff --git a/Misc/NEWS b/Misc/NEWS
index 9d32b12..0233823 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -89,6 +89,9 @@
 Library
 -------
 
+- Issue #13781: Prevent gzip.GzipFile from using the dummy filename provided by
+  file objects opened with os.fdopen().
+
 - Issue #13589: Fix some serialization primitives in the aifc module.
   Patch by Oleg Plakhotnyuk.