diff -r bcf72d7b1524 -r 823a580448d7 mercurial/localrepo.py
--- a/mercurial/localrepo.py	Thu Sep 20 15:18:13 2018 -0700
+++ b/mercurial/localrepo.py	Thu Sep 20 15:30:00 2018 -0700
@@ -588,6 +588,7 @@
     # Map of requirements to list of extensions to load automatically when
     # requirement is present.
     autoextensions = {
+        b'largefiles': [b'largefiles'],
         b'lfs': [b'lfs'],
     }