rolling issue…

So now that Ayden has learned how to roll over there is no stopping the little guy.  Each time you put him on the floor he rolls over onto his tummy. The issue right now is that when he rolls over onto his tummy this puts pressure on his tummy and he ends up spitting up!  (Ayden is not really a spit up baby so this is very strange to us). I even waited at least an hour before lying him down on his back, but when he rolled over and was on his tummy he spit up….very strange….I don’t know how to deal with this issue…..any thoughts?