Baby rolling over

Arroz con Pollo • 💉LPN🇵🇦Latina & Spicy🔥 Mommy of 2 💙💙
My 3 MO is starting to roll over but he can't really control it yet. I laid him down on his back and this morning i woke up and he was on his belly. I know it's dangerous for them to sleep on their bellies, but how do I prevent him from rolling over at night when we're asleep?