Why not major in one and minor in the other? Even though my only major was Computer Science, I still took enough English classes to minor in English. Took a class on the History of the English Language (learned how to read Old and Middle English), two American Lit classes, a Middle Eastern Literature class, the Technical Writing course I needed for CS anyway, and a couple of composition classes (maybe one or two others, I don't remember). And it didn't take any more time than I needed anyway.
