--- a/mercurial/repair.py	Thu Sep 03 11:07:47 2020 -0400
+++ b/mercurial/repair.py	Tue Sep 01 18:08:24 2020 +0530
@@ -27,6 +27,7 @@
     phases,
     pycompat,
     requirements,
+    scmutil,
     util,
 )
 from .utils import (
@@ -419,7 +420,7 @@
 
 def manifestrevlogs(repo):
     yield repo.manifestlog.getstorage(b'')
-    if requirements.TREEMANIFEST_REQUIREMENT in repo.requirements:
+    if scmutil.istreemanifest(repo):
         # This logic is safe if treemanifest isn't enabled, but also
         # pointless, so we skip it if treemanifest isn't enabled.
         for unencoded, encoded, size in repo.store.datafiles():