Filtering and Bad header in the http response

Hi,

In the filtering I deny the following verbs: OPTIONS, TRACE etc...

Then I perform a request with a dummy verb like 'asd'.

Then the server returns a 405 error, but in the response,I have the following header:

Allow: GET, HEAD, OPTIONS, TRACE.

Is it a bug ? How can I configure the proper header in the response ?

Tx.