--- a/mercurial/util.py	Sat May 21 16:42:59 2016 +0900
+++ b/mercurial/util.py	Sat May 21 16:52:04 2016 +0900
@@ -70,6 +70,7 @@
 
 _ = i18n._
 
+bindunixsocket = platform.bindunixsocket
 cachestat = platform.cachestat
 checkexec = platform.checkexec
 checklink = platform.checklink