The Millers completed the loan signing of Cardiff City midfielder Tom Adeyemi on a season-long deal in August 2016.
The 24-year-old has signed a deal until June 9th 2017, and made his debut for the club in the 1-0 victory over Brentford.
Adeyemi has previously spent time on loan at Bradford City, Oldham Athletic and Brentford, as well as enjoying stints with Birmingham City and Leeds United.
He started his career with Norwich City making 17 senior appearances for the club before leaving for Cardiff in 2014.
Last season he enjoyed a successful loan stint with Leeds United starting 17 Championship games.
The midfielder boasts a wealth of Championship experience despite only being 24, and adds a physical presence to the Millers’ engine room.