diff --git a/src/calibre/gui2/dialogs/catalog.py b/src/calibre/gui2/dialogs/catalog.py
index d792707670..b53f6d3043 100644
--- a/src/calibre/gui2/dialogs/catalog.py
+++ b/src/calibre/gui2/dialogs/catalog.py
@@ -17,7 +17,6 @@ from calibre.customize.ui import catalog_plugins
 
 class Catalog(QDialog, Ui_Dialog):
     ''' Catalog Dialog builder'''
-    widgets = []
 
     def __init__(self, parent, dbspec, ids):
         import re, cStringIO