--- a/hgext/rebase.py	Wed Jan 09 19:54:01 2019 -0800
+++ b/hgext/rebase.py	Sat Jan 12 17:43:36 2019 +0900
@@ -177,7 +177,7 @@
         if e:
             self.extrafns = [e]
 
-        self.backupf = ui.configbool('ui', 'history-editing-backup')
+        self.backupf = ui.configbool('rewrite', 'backup-bundle')
         self.keepf = opts.get('keep', False)
         self.keepbranchesf = opts.get('keepbranches', False)
         self.obsoletenotrebased = {}