Help... night time roll over.

Our 4.5 months old has been rolling over for sometime and he is now doing it at night. His head is super strong so I am not worried about him not breathing etc, but he rolls to his tummy eventually wakes up and forgets he can roll back over. Any suggestions on how to deal with this? The only thing I can do is pick him up, nurse him and he goes right back to sleep.

He had been sleeping through the night until this so now mommas sleep is being compromised. Ughhh