--- a/mercurial/hgweb/server.py
+++ b/mercurial/hgweb/server.py
@@ -107,7 +107,7 @@ class _hgwebhandler(object, BaseHTTPServ
                 env[hkey] = hval
         env['SERVER_PROTOCOL'] = self.request_version
         env['wsgi.version'] = (1, 0)
-        env['wsgi.url_scheme'] = type(self).url_scheme
+        env['wsgi.url_scheme'] = self.url_scheme
         env['wsgi.input'] = self.rfile
         env['wsgi.errors'] = _error_logger(self)
         env['wsgi.multithread'] = isinstance(self.server,