Need help setting up a Mail filter to mark gmail Spam as read

I’m using gmail with Mail and have set up a Smart Folder that catchs all my unread mail. What I’m trying to accomplish is to mark all Spam as read, so it doesn’t show up in this Smart Folder.

I have a rule:

Gmail seems to do a pretty good job catching Spam and labeling it in the header but my rule doesn’t seem to be reading the header. For example,

Shows up in my Unread Smart folder. I’m guessing that even though I see the “Spam” designation, for some reason it really isn’t part of the message and thus isn’t caught by the filter.

Any suggestions would be appreciated.

STeve