About 90 minutes into Mark Zuckerberg’s testimony on Capitol Hill on Tuesday, in which the Facebook CEO was grilled on the social media company’s privacy practices, U.S. Sen. Dick Durbin, D-Illinois, gave a shout-out to his home state’s Biometric Information Privacy Act, or BIPA—a law governing the collection and storage of biometric indicators like fingerprints, facial features and iris scans.

“We’re now in a fulsome debate on that,” said Durbin, referring to proposed legislation in Illinois to roll back portions of the law. “I’m afraid that Facebook has taken the position of trying to carve out exceptions to [BIPA]. I hope you’ll fill me in on how that is consistent with protecting privacy,” Durbin said.