diff -r 2d6aea053153 -r f877b3628015 mercurial/changelog.py
--- a/mercurial/changelog.py	Thu Oct 01 09:29:49 2020 +0200
+++ b/mercurial/changelog.py	Thu Oct 01 09:42:39 2020 +0200
@@ -599,7 +599,7 @@
         l = [hex(manifest), user, parseddate] + sortedfiles + [b"", desc]
         text = b"\n".join(l)
         return self.addrevision(
-            text, transaction, len(self), p1, p2, sidedata=sidedata
+            text, transaction, len(self), p1, p2, sidedata=sidedata, flags=flags
         )
 
     def branchinfo(self, rev):