Pace bowler Clint McKay has been called into the Australian Test squad as Ben Hilfenhaus has not been doing well with his fitness and is a doubtful starter for the second Test match against Pakistan in Leeds.
McKay, 27, will take a break from competing for Yorkshire in the Friends Provident T20 to join the squad ahead of Wednesday's Test at Headingley.
The Victorian made his only Test appearance against the West Indies last summer, recording figures of one for 101 at the WACA.
The Victorian went on the March tour of New Zealand but was not selected in either of the two Tests.
He most recently took part in Australia's 3-2 ODI series loss to England before returning to play for his county side Yorkshire.
Hilfenhaus injured his left shoulder attempting a diving save on the fourth and final day of Australia's 150-run victory over Pakistan at Lord's.
Team physio Alex Kountouris has been working with the Tasmanian since Friday's win, and Australian selectors remain hopeful he will recover from soreness by Wednesday.
If Hilfenhaus is unable to hold his place, it is anticipated that South Australian paceman Peter George will make his Test debut.
George was a late addition to the squad when fast bowler Ryan Harris was struck down with a knee injury during the fifth one-day international against England.