I was in a similar situation as you back in college. I was majoring in Electrical and Comp Engineering and was undecided between minor in Econ vs. Math/Physics. I took two econ classes and realized I could just read a book and learn what the hell they were talking about. I liked physics but I soon realized in higher level physics classes all you do is math. So I decided to minor in Math. Also, my decision to minor in Math was because I wanted to go to grad school at the time. It looks like you want to work in the industry. If you are applying as a programmer, your employer couldn't care less whether you have a math minor or a business. Don't choose classes thinking it might be useful to impress employers/admission folks in the future. I ended up working in the industry and all my Math was in vain! Just kidding. If you haven't taken any economics classes I would suggest you take one or two. (I had to as a part of my social science elective).

But I will say one thing: Math courses definitely opened my horizon. I liked them so much, I was 2 courses shy of a major. If you do decide to take up Math as a minor, consider taking some of these courses:
linear algebra/vector spaces (you will finally understand what the heck is a matrix), probability/statistics, stochastic processes/random variables (these are used almost everywhere from algorithm analysis to signal processing), combinatorics, graph theory (used in theoretical comp sci problems...those NP hard, complete stuff), differential equations(used in modeling), number theory (used in encryption).

All the best to you and as Galileo once said:
"Mathematics is the language in which God wrote the universe"

Peace,
FF