Alt Tag for Feedburner Image

[UNL Beth]

I am trying to get my website to pass the WAVE web accessibility
evaluation tool. The only thing that is holding it back from doing
that is that the Feedburner logo at the bottom of the feed does not
have an alt tag. Surely this couldn't be hard to add to the code, but
I think that it would take modifying the javascript to do so. Can
anyone help with this?

Thanks,
Beth