Academy out half Paddy Jackson has been called into the Ulster squad ahead Saturday's Magners League clash with Munster at Thomond Park Stadium in Limerick. (kick-off 7.30pm)
Ulster Captain Rory Best, who has recovered from a jaw injury, is also included in the enlarged squad.
Best has spent the past month sidelined after fracturing his cheekbone during Ireland's defeat to New Zealand at the Aviva Stadium in November.
Irish internationals Tom Court and Paddy Wallace also feature with Andrew Trimble rested under the terms of the IRFU Player Management Programme while Stephen Ferris is still absent with a leg injury.
The Ulster starting team and replacements will be named on Friday.
(Ulster squad): Bryan Young, Declan Fitzpatrick, Tom Court, BJ Botha, Jerry Cronin, Rory Best, Andi Kyriacou, Tim Barker, Neil McComb, Johann Muller, Ryan Caldwell, Chris Henry, Pedrie
Wannenburg, Willie Faloon, TJ Anderson, Robbie Diack, Adam D'Arcy, David McIlwaine, Jamie Smith, Simon Danielli, Tommy Seymour, Luke Marshall, Nevin Spence, Ian Whitten, Paddy Wallace, Niall O'Connor, Paddy Jackson, Paul Marshall, Ruan Pienaar, Ian Porter