diff -r 7eba8f83129b -r e7aa113b14f7 hgext/acl.py
--- a/hgext/acl.py	Wed Aug 01 12:57:15 2018 -0700
+++ b/hgext/acl.py	Wed Aug 01 13:00:45 2018 -0700
@@ -220,6 +220,7 @@
     error,
     extensions,
     match,
+    pycompat,
     registrar,
     util,
 )
@@ -403,7 +404,7 @@
     allow = buildmatch(ui, repo, user, 'acl.allow')
     deny = buildmatch(ui, repo, user, 'acl.deny')
 
-    for rev in xrange(repo[node].rev(), len(repo)):
+    for rev in pycompat.xrange(repo[node].rev(), len(repo)):
         ctx = repo[rev]
         branch = ctx.branch()
         if denybranches and denybranches(branch):