diff --git a/bip-taproot.mediawiki b/bip-taproot.mediawiki
index 1b8ed0cf..460ce12e 100644
--- a/bip-taproot.mediawiki
+++ b/bip-taproot.mediawiki
@@ -224,7 +224,7 @@ def taproot_output_script(internal_pubkey, script_tree):
      - a list of two elements, each with the same structure as script_tree itself"""
      - None
     if script_tree is None:
-        h = b''
+        h = bytes()
     else:
         _, h = taproot_tree_helper(script_tree)
     output_pubkey, _ = taproot_tweak_pubkey(internal_pubkey, h)