diff --git a/WebIDL.py b/WebIDL.py
index d8f87bc332d..c8bf9857434 100644
@@ -9389,6 +9389,7 @@ class Parser(Tokenizer):
module=self,
outputdir=outputdir,
errorlog=logger,
+ debug=False,
write_tables=False,
# Pickling the grammar is a speedup in
# some cases (older Python?) but a
--
2.51.0