diff -r 4d9458e06ef0 -r 4d5d493ea54a mercurial/localrepo.py
--- a/mercurial/localrepo.py	Fri Jun 30 03:42:29 2017 +0200
+++ b/mercurial/localrepo.py	Fri Jun 30 03:42:30 2017 +0200
@@ -2074,7 +2074,7 @@
     """
     ui = repo.ui
     requirements = {'revlogv1'}
-    if ui.configbool('format', 'usestore', True):
+    if ui.configbool('format', 'usestore'):
         requirements.add('store')
         if ui.configbool('format', 'usefncache'):
             requirements.add('fncache')