--- a/hgext/convert/hg.py	Fri Aug 10 14:44:50 2018 -0700
+++ b/hgext/convert/hg.py	Fri Aug 10 15:01:06 2018 -0700
@@ -358,7 +358,7 @@
             p2 = node
 
         if self.filemapmode and nparents == 1:
-            man = self.repo.manifestlog._revlog
+            man = self.repo.manifestlog.getstorage(b'')
             mnode = self.repo.changelog.read(nodemod.bin(p2))[0]
             closed = 'close' in commit.extra
             if not closed and not man.cmp(m1node, man.revision(mnode)):