Rosenior joined Roy Keane's side on loan at the end of August and the Royals have allowed him to feature against them this weekend.
Gareth McAuley remains sidelined with a thigh injury so Alex Bruce will continue to deputise at centre-half while fellow defender Tommy Smith is also out after suffering a freak hand injury last week.
The youngster had an operation after dislocating two fingers and seeing a bone come through his hand and will be out for several weeks.
Teenage striker Connor Wickham is available again however, after missing two games due to international duty.
Midfielder David Norris remains sidelined with his serious knee injury, while Argentinian winger Luciano Civelli is also yet to feature this season as he recovers from his knee ligament damage.