Facebook has announced today that it will no longer allow messaging in its main mobile application later this week. Instead, any users who wish to take advantage of the company’s messaging platform will have to do so through the standalone Facebook Messenger app.

Earlier this year the comapany started informing some European users of the upcoming move to the separate app, but this is the first time a solid timetable has been set for the transition. For users who already have the Messenger app installed, nothing will change. Once the change goes into effect, the “Messages” tab in the Facebook client will simply link to the Messenger app rather than an inbox view.

Facebook said in a statement:

In the next few days, we’re continuing to notify more people that if they want to send and receive Facebook messages, they’ll need to download the Messenger app. As we’ve said, our goal is to focus development efforts on making Messenger the best mobile messaging experience possible and avoid the confusion of having separate Facebook mobile messaging experiences. Messenger is used by more than 200 million people every month, and we’ll keep working to make it an even more engaging way to connect with people.