diff --git a/oml/media/cbz.py b/oml/media/cbz.py
index b08c972..60f0672 100644
--- a/oml/media/cbz.py
+++ b/oml/media/cbz.py
@@ -1,9 +1,14 @@
 # -*- coding: utf-8 -*-
 import os
 import zipfile
+import logging
 
 import ox
 
+
+logger = logging.getLogger(__name__)
+
+
 def cover(path):
     data = None
     logger.debug('cover %s', path)