diff -r ab06b5ef93f7 -r 94494031f659 mercurial/hgweb/webutil.py
--- a/mercurial/hgweb/webutil.py	Mon Feb 29 17:46:06 2016 +0900
+++ b/mercurial/hgweb/webutil.py	Thu Mar 31 18:09:09 2016 +0800
@@ -341,6 +341,7 @@
 
     entry = commonentry(repo, ctx)
     entry.update(
+        allparents=lambda **x: parents(ctx),
         parent=lambda **x: parents(ctx, rev - 1),
         child=lambda **x: children(ctx, rev + 1),
         changelogtag=showtags,