Luukkonen, 22, was selected by the Sabres during the second round of the 2017 NHL Draft. In 14 games with Rochester this season, he's 7-5-2 with a .888 save percentage and a 3.60 goals-against average.
He was added to the taxi squad on Saturday and has yet to appear in an NHL game.
Dustin Tokarski, who was named the NHL's First Star of the Week on Monday, will start for Buffalo tonight against the Boston Bruins at KeyBank Center. Luukkonen will serve as the backup goalie.
In a corresponding move, the team reassigned goaltender Michael Houser to the taxi squad.
Catch the action on MSG in Buffalo and NBCSN nationwide at 6:30 p.m. Listen live on WGR 550. Pregame coverage on MSG will begin at 6 p.m.
