diff --git a/src/calibre/gui2/library/delegates.py b/src/calibre/gui2/library/delegates.py
index 4dcfc988b3..eb9ac48bf1 100644
--- a/src/calibre/gui2/library/delegates.py
+++ b/src/calibre/gui2/library/delegates.py
@@ -773,7 +773,7 @@ class CcTemplateDelegate(QStyledItemDelegate):  # {{{
 
     def __init__(self, parent):
         '''
-        Delegate for custom_column bool data.
+        Delegate for composite custom_columns.
         '''
         QStyledItemDelegate.__init__(self, parent)
         self.disallow_edit = gprefs['edit_metadata_templates_only_F2_on_booklist']