Amen, take it as a minor. You won't regret it. Like Tates said, it will give you much broader perspective than your CS degree ever will. It's not a bad idea to compliment very specific training with a broader area of knowledge. That was the whole idea of universities to begin with actually, to give you a broader knowledge, not training focused entirely on one skill. That's what trade schools were for, but universities started shifting that way and now they have to use core curricula to force students not to study just one thing. A lot of employers like people that can do more than just one thing and it can go over great in interviews if you explain it properly.
I was a history MAJOR (wow, it's amazing I had the skills to operate this fancy shiny box

) and I loved every minute of it. I actually switched over from engineering during my second year when I realized I'd rather bash my head into a wall rather than do that for the rest of my life. No offense to any engineers, it just wasn't for me. I originally thought about double-majoring in chemistry, biology or a business field when I heard all the naysayers (including my Engineering counselor) say a history degree was worthless and you wouldn't be able to get a job with it. But instead of double-majoring I decided I'd go ahead and pursue a masters degree in a different field, since once you get a masters nobody really cares what your undergraduate degree was for the most part. Plus, I found out through various summer jobs at big corporations that most of the people I encountered who were fairly high up in their field had little or no educational background in that area. That obviously doesn't fly for engineers, doctors, etc. but for the vast majority of jobs out there, you can still perform those duties if you're smart enough and quick to learn. I learned about computers on my own and I was able to land a job in that area in spite of that fact that neither my degrees really focused in that area. There's also the fact that once you get out into your first 'real' job and get a few years experience, that work experience is probably going to mean more to any future employers than your college work you did nearly a decade ago.
Anyway, that's my long-winded way of saying take history as your minor. You'll enjoy it.