--- a/mercurial/ui.py	Sat Jun 17 12:52:31 2017 +0200
+++ b/mercurial/ui.py	Sat Jun 17 12:53:40 2017 +0200
@@ -574,7 +574,7 @@
             raise error.ConfigError(_("%s.%s is not a valid %s ('%s')")
                                     % (section, name, desc, v))
 
-    def configint(self, section, name, default=None, untrusted=False):
+    def configint(self, section, name, default=_unset, untrusted=False):
         """parse a configuration element as an integer
 
         >>> u = ui(); s = 'foo'