He will play in a friendly against Blackpool today.
The former England striker, 33, has not featured for the Potters since October after a hamstring problem.
Boss Tony Pulis revealed: "Michael's stepping it up."
Tribal Football Staff are dedicated to the football tribes from all over the world. Our team is passionate about delivering football news to our hundreds of thousands of followers in all the corners of the globe. Football is life, It never stops, Neither do we.