Scotland have called up Paul McGinn after Nathan Patterson and Ryan Fraser were forced to pull out of the squad.
The Hibs star joins his brother John in the set up having previously been involved in the squad last October following a host of call-offs.
He didn't get a chance to make his debut on that occasion but will be hoping he can this time around, although Stephen O'Donnell is likely to take the starting spot at right wing back.
Patterson and Fraser are among three call-offs for the game against Austria with Kenny McLean also forced to leave the Scotland camp ahead of the trip.
It's the third game in six days for many of the players as Scotland look to qualify for the Qatar World Cup next year.
It's been a frustrating camp so far with a 2-0 defeat to Denmark that could have been much worse before a lacklustre 1-0 win over minnows Moldova at Hampden.
But Clarke's men will travel to Austria hoping to get a result and all but knock them out of contention for second spot after their heavy defeat to Israel on Saturday.
The Easter Road defender has been a mainstay in Jack Ross' side.
