The U.S. is saying goodbye to the gender binary – at least as far as passports are concerned.

On April 11 the U.S. will officially add “X” as a third gender option to passports.

Last year Secretary of State Antony Blinken announced the State Department would allow applicants to “self-select their gender as ‘M’ or ‘F,’” according to the Washington Blade.

In 2015, Dana Zzyym, an intersex U.S. Navy veteran who identifies as non-binary, filed a lawsuit after the State Department denied their application for a passport with an “X” gender marker. Zzyym received the first gender-neutral American passport in October 2021.

“The Department of State has reached another milestone in our work to better serve all U.S. citizens, regardless of their gender identity,” said Blinken in a statement March 31. “In June, I announced that U.S. passport applicants could self-select their gender and were no longer required to submit any medical documentation, even if their selected gender differed from their other citizenship or identity documents.”

He noted the “X” option will be available for other forms of documentation next year.