diff --git a/WebIDL.py b/WebIDL.py
index d60c817dafe..be32abc754e 100644
or identifier == "WantsEventListenerHooks"
or identifier == "Serializable"
or identifier == "Abstract"
+ or identifier == "Inline"
):
# Known extended attributes that do not take values
if not attr.noArguments():
--
2.51.0