West Ham have agreed a deal to re-sign goalkeeper Darren Randolph from Middlesbrough for £4 million.
Republic of Ireland goalkeeper Randolph, who is currently sidelined with a thigh injury, will return to the Hammers, where he spent two seasons between 2015 and 2017.
Randolph, 32, will provide competition for Lukasz Fabianski at the Premier League club under new manager David Moyes.
West Ham's backup options Roberto and David Martin have failed to impress, with the latter currently absent through injury.
Randolph is expected to return to full fitness in less than two weeks.
The Hammers also let Adrian leave the London Stadium on a free transfer in the summer, with the Spaniard going on to impress for league leaders Liverpool after signing for Jurgen Klopp's Reds.
West Ham had previously seen a £2 million bid for the Ireland international rejected by the Championship club.
Republic of Ireland underage international Conor Coventry has also signed a new long-term contract at West Ham.