Unable to enable attachments for node types

I've installed the latest attachment module on Drupal 5.1. I've been unable to enable attachments for any node type. It appears to be line 72 in the attachment_form_alter hook.

Shouldn't this:

$form['workflow']['attachment_settings'] = array(

Actually be:

$form['workflow']['attachment_node'] = array(

That gets it to work for me,

Regards

Steve