Non-binary passengers on United Airlines will now be able to select more fitting options for their gender identities. Last week, the airline introduced options for travelers to select the “Mx.” title as a prefix on their flight reservations. Travelers will also be able to select from more diverse gender options, including M(male), F(female), U(undisclosed) or X(unspecified), in alignment with the gender listed on their passports, licenses, or identification cards.

“United is determined to lead the industry in LGBT inclusivity, and we are so proud to be the first U.S. airline to offer these inclusive booking options for our customers,” said United’s Chief Customer Officer Toby Enqvist in a press release. “United is excited to share with our customers, whether they identify along the binary of male or female or not, that we are taking the steps to exhibit our care for them while also providing additional employee training to make us even more welcoming for all customers and employees.”

Employees of United Airlines will also undergo LGBTQ+ competency training in collaboration with The Trevor Project and the Human Rights Campaign.

“At the Human Rights Campaign, we believe being acknowledged as the gender you identify with is part of treating everyone with dignity and respect,” said Beck Bailey, acting director of the Workplace Equality Program. “By providing non-binary gender selection for ticketing and the gender-inclusive honorific ‘Mx’ in user profiles, United Airlines is taking an important step forward for non-binary inclusion.”

Non-binary options are now available for United Airline travelers.