Former Waratahs prop Angus Ta'avao has been called into the All Blacks after Joe Moody was ruled out of the Rugby Championship with injury.
Starting loosehead Moody will have his thumb in a cast for six weeks after suffering a fracture during Saturday's 40-12 win over Australia in Auckland to secure the Bledisloe Cup.
With fringe contender Jeff Toomaga-Allen also injured, the uncapped Ta'avao is promoted ahead of next week's Test against Argentina in Nelson.
The 28-year-old made 22 appearances for the Waratahs across 2016 and 2017 before his form this year with the Chiefs caught the eye of New Zealand coach Steve Hansen.
Hansen said Taavao had improved greatly in the 2018 Super Rugby season.
"Angus had a big season for the Chiefs during the Investec Super Rugby season, was part of a very good Chiefs pack and has made big strides on the technical aspects of his position," he said.
"We look forward to him joining the squad."
New Zealand hosts the Pumas on Saturday September 8 in Nelson, kicking off at 5:35pm AEST, LIVE on FOX SPORTS.