diff --git a/src/calibre/gui2/preferences/save_template.py b/src/calibre/gui2/preferences/save_template.py
index f3e573e5d3..3efd83df70 100644
--- a/src/calibre/gui2/preferences/save_template.py
+++ b/src/calibre/gui2/preferences/save_template.py
@@ -53,7 +53,7 @@ class SaveTemplate(QWidget, Ui_Form):
         from calibre.gui2.ui import get_gui
         db = get_gui().current_db
         view = get_gui().library_view
-        mi = tuple(map(db.new_api.get_proxy_metadata, view.get_selected_ids()[:10]))
+        mi = list(map(db.new_api.get_proxy_metadata, view.get_selected_ids()[:10]))
         if not mi:
             error_dialog(self, _('Must select books'),
                          _('One or more books must be selected so the template '