The Besiktas goalkeeper suffered a groin injury in Scotland's friendly win over Australia last month and was rated doubtful for the Hampden games on September 8 and 11.
But he is in Craig Levein's squad along with Blackpool goalkeeper Matt Gilks and Cardiff's David Marshall.
There is no place for the in-form Celtic winger Kris Commons while Leeds striker Ross McCormack and Huddersfield forward Jordan Rhodes retain their places after scoring in the 3-1 win over Australia.
Captain Darren Fletcher is still missing as he battles to overcome a bowel condition.
Striker Kenny Miller returns after being rested for the Australia victory but there is no place for his Vancouver Whitecaps team-mate Barry Robson.
Barry Bannan drops out but his Aston Villa team-mate Alan Hutton remains in the squad despite not playing for his club this season.
Southampton left-back Danny Fox keeps his place amid the absence of the injured Phil Bardsley.
Rangers midfielder Ian Black and Blackburn striker David Goodwillie, who were both late call-ups for the Australia friendly, are left out. There are no Rangers players in the squad.