diff --git a/src/calibre/db/categories.py b/src/calibre/db/categories.py
index 45c9e5711f..009261f81f 100644
--- a/src/calibre/db/categories.py
+++ b/src/calibre/db/categories.py
@@ -9,7 +9,6 @@ __docformat__ = 'restructuredtext en'
 
 import copy
 from functools import partial
-from operator import attrgetter
 from future_builtins import map
 
 from calibre.ebooks.metadata import author_to_author_sort