American Airlines (AA) recently announced their decision to offer customers non-binary gender options when booking tickets.

American Airlines spokesperson, to ‘USA Today’ Passengers will now also be able to select “U” or “X” for their gender, making AA the second airline to ever offer more than two gender options. The option is only available through over-the-phone bookings, but will soon be available on their website as well.

Aside from being more inclusive, American Airlines’ decision is also in compliance with recently-implemented regulations regarding non-binary IDs. According to ‘USA Today,’ over 7,000 gender X driver’s licenses and identification cards have been issued across nine states and the District of Columbia Unnamed Source, to Fox Business.