diff -r eb49f8fb11d8 -r b08aed45ef00 mercurial/hgweb/server.py
--- a/mercurial/hgweb/server.py	Thu Feb 02 17:27:33 2023 +0100
+++ b/mercurial/hgweb/server.py	Thu Feb 02 17:27:43 2023 +0100
@@ -344,7 +344,7 @@
     threading.active_count()  # silence pyflakes and bypass demandimport
     _mixin = socketserver.ThreadingMixIn
 except ImportError:
-    if util.safehasattr(os, b"fork"):
+    if util.safehasattr(os, "fork"):
         _mixin = socketserver.ForkingMixIn
     else: