diff --git a/src/calibre/gui2/library/delegates.py b/src/calibre/gui2/library/delegates.py
index e9b9255c64..ae9d6e2f71 100644
--- a/src/calibre/gui2/library/delegates.py
+++ b/src/calibre/gui2/library/delegates.py
@@ -292,7 +292,7 @@ class CcEnumDelegate(QStyledItemDelegate): # {{{
     def createEditor(self, parent, option, index):
         m = index.model()
         col = m.column_map[index.column()]
-        editor = QComboBox(parent)
+        editor = DelegateCB(parent)
         editor.addItem('')
         for v in m.custom_columns[col]['display']['enum_values']:
             editor.addItem(v)