I want to know how to file, as my husband is not a US citizen or resident and did not earn any income in the US in 2016.

I am a US citizen but am a resident of and work in Europe, he is not a US citizen or resident and works in Europe as well. I would like to know if I should say that I am filing jointly or separately, it is a weird situation because I don't believe he has to file any tax return with the US. We don't own any property or houses in the US, I have a bank account and pay a student loan in the US but that is all.