diff --git a/mercurial/context.py b/mercurial/context.py
--- a/mercurial/context.py
+++ b/mercurial/context.py
@@ -819,6 +819,8 @@ class basefilectx(object):
         return self._changectx.phase()
     def phasestr(self):
         return self._changectx.phasestr()
+    def obsolete(self):
+        return self._changectx.obsolete()
     def manifest(self):
         return self._changectx.manifest()
     def changectx(self):
diff --git a/mercurial/hgweb/webutil.py b/mercurial/hgweb/webutil.py
--- a/mercurial/hgweb/webutil.py
+++ b/mercurial/hgweb/webutil.py
@@ -361,6 +361,7 @@ def commonentry(repo, ctx):
         'date': ctx.date(),
         'extra': ctx.extra(),
         'phase': ctx.phasestr(),
+        'obsolete': ctx.obsolete(),
         'branch': nodebranchnodefault(ctx),
         'inbranch': nodeinbranch(repo, ctx),
         'branches': nodebranchdict(repo, ctx),