Thousands more firearms dealers across the United States will have to run background checks on buyers when selling at gun shows or other places outside brick-and-mortar stores, according to a Biden administration rule that will soon go into effect.

The rule aims to close a loophole that has allowed tens of thousands of guns to be sold every year by unlicensed dealers who don’t perform background checks to ensure the potential buyer is not legally prohibited from having a firearm.

“This is going to keep guns out of the hands of domestic abusers and felons,” President Joe Biden said in a statement. “And my administration is going to continue to do everything we possibly can to save lives. Congress needs to finish the job and pass universal background checks legislation now.”