Scrum half Kieran Campbell returns to the Ulster squad for Friday night's vital Magners League clash with Glasgow at Firhill.
The former London Irish pivot started the opening two games of the season, including the win against the Ospreys, but was among the replacements for the Dragons game and was left out for the Llanelli defeat.
But he comes in at the expense of Paul Marshall for the trip to Scotland as coach Mark McCall continues his rotation policy.
Harlequins hooker Stuart Philpott also comes in, to provide cover for captain Rory Best, with Nigel Brady dropping out.
With Neil Hanna ruled out for the season and Matt Miles sidelined, McCall has three fit hookers and rotates the Dungannon man to keep him fresh.
Lock Matt McCullough is still struggling with a toe injury and is ruled out while former All Black Paul Steinmetz is recovering from a head injury.
The coach has some big decisions to make and has delayed naming his starting line with the crucial call set to be at out half.
Paddy Wallace started the Leinster game but it was talisman David Humphreys that sparked the Ulster revival from 13-0 down to get a draw.
McCall also must decide whether to bring Justin Harrison back into the starting line-up.
The Australian lock also inspired the crowd when he came on last week and is pushing Ryan Caldwell and Carlo Del Fava close.
McCall is hoping the side can go on from the draw and build confidence with a win at Glasgow before the Heineken Cup.
"Hopefully that performance in the last half hour can be a sign of us turning the corner and we can back that up with a strong performance against Glasgow," he says.
Ulster Squad: Backs: Mark Bartholomeusz; Isaac Boss; Tommy Bowe; Bryn Cunningham; Rob Dewey; David Humphreys; Kieran Campbell; Mark McCrea; Andrew Trimble; Paddy Wallace. Forwards: Neil Best; Rory Best (Captain); Stuart Philpott; Ryan Caldwell; Kieron Dawson; Carlo del Fava; Stephen Ferris; Declan Fitzpatrick; Justin Fitzpatrick; Justin Harrison; Roger Wilson; Bryan Young.