Facebook founder Mark Zuckerberg has issued a reminder – and a clear warning – to Facebook Messenger users who take a screenshot of their conversations.

The CEO of parent company Meta said in a post that the Messenger update would notify users if a screenshot of their conversation was taken by someone else, according to The Independent.

“New update to end-to-end encrypted (messenger) chats so you’ll get a notification if someone takes a screenshot of a disappearing message,” Zuckerberg wrote with a screenshot of a conversation with his wife, Priscilla Chan.