From 9a7935b7f9ca69681cf67f4dde0900fcd0f74a48 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Wed, 30 Mar 2022 15:30:47 +0530
Subject: [PATCH] Update ftype when reading metadata from cbz sub-file

---
 src/calibre/customize/builtins.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/calibre/customize/builtins.py b/src/calibre/customize/builtins.py
index dbba022538..2a33393d6c 100644
--- a/src/calibre/customize/builtins.py
+++ b/src/calibre/customize/builtins.py
@@ -114,6 +114,7 @@ class ComicMetadataReader(MetadataReaderPlugin):
             fcn = zf.open('comics.txt').read().decode('utf-8').splitlines()[0]
             oname = getattr(stream, 'name', None)
             stream = zf.open(fcn)
+            ftype = fcn.split('.')[-1].lower()
             if oname:
                 stream.name = oname
         if hasattr(stream, 'seek') and hasattr(stream, 'tell'):