Highlighters that are compatible with fountain pen ink? Hello,

I'm in need of a highlighter that will be able to highlight fountain pen ink without smearing my writing. I tried a typical Sharpie highlighter, and it just doesn't work. I was thinking maybe I could buy a cheap Ahab and fill it with fountain pen highlighter ink, but I have a feeling that might smear my writing as well. Are there any good highlighters or ways to highlight fountain pen ink?