--- a/mercurial/util.py	Fri Dec 29 22:15:37 2017 -0500
+++ b/mercurial/util.py	Fri Dec 29 22:54:14 2017 -0500
@@ -109,6 +109,7 @@
 expandglobs = platform.expandglobs
 explainexit = platform.explainexit
 findexe = platform.findexe
+getfsmountpoint = platform.getfsmountpoint
 getfstype = platform.getfstype
 gethgcmd = platform.gethgcmd
 getuser = platform.getuser