Facebook allows you to “mark yourself safe” if you are in a dangerous area where a tragedy has occurred to let your family and friends know that you are OK. The Facebook safety check feature started after seeing how people used social media in the wake of the 2011 earthquake and tsunami in Japan.

The Black Lives Matter Global Network is giving that “safety check” feature a twist, allowing black users of the social media website to mark themselves “unsafe” for being black in America. Black Lives Matter activists are calling it the “Unsafety Check” and launched its website, MarkYourselfUnsafe.com, on Tuesday.

“From slavery to Jim Crow to prejudicial and deadly policing, America has never been a safe place for black people,” BLM co-founder Patrisse Cullors said in a statement. “We need to take action to continue to raise awareness about how racism impacts our families and communities.

“We know that social media is only one way to take action on behalf of the Movement for Black Lives,” Cullors added. “After marking yourself unsafe, we ask that people take additional action by joining local organizers in demanding justice in the streets.”

The feature utilizes Facebook Connect and requires MarkYourselfUnsafe.com to ask permission for access to users’ profiles and friends lists. Once connected, the feature asks for additional permission to post a message on users’ profiles and it also uses location data for an accompanying map. After it is activated, the message that appears on the user’s profile states that the user has either marked themselves as unsafe or, in the case of a non-black user, has marked themselves as a supporter of black lives.

According to the website: “Being Black in America is a national emergency. Black people are being attacked and murdered while doing day-to-day activities. This week, it’s important to let the world know how you feel, to come together, and resist. Log in to mark yourself unsafe or to show your support.”

MarkYourselfUnsafe.com is part of an ongoing week of action, from Martin Luther King Jr. Day to Inauguration Day, launched by the Movement for Black Lives, a coalition of over 50 black activists groups. Mass protests are expected in Washington, D.C., and around the country, when President-elect Donald Trump takes the oath of office tomorrow.