From 30a8a80d25a730bb71daa8f9e3e94386ddd3e3ce Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 11 Mar 2026 02:43:12 +0000
Subject: [PATCH] Fix: Use MOBI fallback for KFX format when downloading news
 periodicals

Fixes #3033
---
 src/calibre/gui2/tools.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/calibre/gui2/tools.py b/src/calibre/gui2/tools.py
index 743d78857a..f0b8989509 100644
--- a/src/calibre/gui2/tools.py
+++ b/src/calibre/gui2/tools.py
@@ -277,8 +277,8 @@ class QueueBulk(QProgressDialog):
 
 def fetch_scheduled_recipe(arg):  # {{{
     fmt = prefs['output_format'].lower()
-    # Never use AZW3 for periodicals...
-    if fmt == 'azw3':
+    # Never use AZW3 or KFX for periodicals...
+    if fmt in ('azw3', 'kfx'):
         fmt = 'mobi'
     pt = PersistentTemporaryFile(suffix=f'_recipe_out.{fmt.lower()}')
     pt.close()