--- a/mercurial/hgweb/__init__.py	Tue Mar 08 10:58:22 2022 +0100
+++ b/mercurial/hgweb/__init__.py	Mon Feb 21 11:24:57 2022 -0700
@@ -36,7 +36,7 @@
     - list of virtual:real tuples (multi-repo view)
     """
 
-    if isinstance(config, pycompat.unicode):
+    if isinstance(config, str):
         raise error.ProgrammingError(
             b'Mercurial only supports encoded strings: %r' % config
         )