Any suggestions on how to include marriage equality in our vows?

I went to a wedding recently where it was said "Marriage is between one man and one woman" and it really irked me. We're a heterosexual couple but we're all for equal rights for homosexuals and believe they have the right to get married too. I want to add something saying that marriage is not just for one man and one woman. Anyone have any good ideas on how to say something like that?