My spouse is not a US citizen and does not have a social security number. Neither of us lived in the US in 2024. What do I enter as SSN for him so I can efile my taxes?

I am a US citizen but I lived abroad 100% of the time with my spouse last year. Turbo tax is insisting I provide a SSN for my spouse but he is not a US citizen, and does not even have a tourist visa to visit the US and is ineligible to get a social security number.