PDF::Writer add_text_wrap

Wondering if anyone else had problems with the add_text_wrap of the pdf-writer gem? I have something that looks like the following below, but it does not wrap down to the next line, it just either runs off the page or stops before the page, depending on the width of the text_wrap. Anyone have any ideas?

@additional_items = @user.additional_items pdf.add_text_wrap(310, 605, 300, @additional_items, 8)