Scrumhalf Jano Vermaak of Western Province has been called up to the Springbok squad as replacement for Ross Cronjé, who sustained a right ankle injury in the 37-15 victory over Argentina on Saturday in Port Elizabeth.
Vermaak, who has already played in three Tests for the Springboks, was on Sunday named in the squad for the away trip to Argentina.
The two teams face each other for a second successive time next Saturday, when their Rugby Championship rematch takes place in Salta.
Loose forward Oupa Mohoje, however, was not considered for selection because of the rib injury he sustained while playing in the Currie Cup for the Free State Cheetahs against the Blue Bulls.
Flyhalf Handré Pollard will remain in South Africa to continue with the final phase of his rehabilitation.
Meanwhile, the Springboks are set to continue with their match preparations in Port Elizabeth, before flying out to Johannesburg on Tuesday and then on to Argentina early on Wednesday morning.
Springbok coach Allister Coetzee will announce his match-day squad of 23 players on Thursday morning (Argentine time) in Buenos Aires, just before the team travels to Salta.
Uzair Cassiem, Lood de Jager, Ruan Dreyer, Dan du Preez, Jean-Luc du Preez, Pieter-Steph du Toit, Eben Etzebeth (captain), Steven Kitshoff, Siya Kolisi, Jaco Kriel, Malcolm Marx, Bongi Mbonambi, Franco Mostert, Tendai Mtawarira, Trevor Nyakane, Coenie Oosthuizen, Chiliboy Ralepelle.
Curwin Bosch, Andries Coetzee, Damian de Allende, Francois Hougaard, Elton Jantjies, Jesse Kriel, Rudy Paige, Raymond Rhule, Jan Serfontein, Courtnall Skosan, Francois Venter, Jano Vermaak.