Ajax say the move comes after veteran keeper Maarten Stekelenburg was ruled out for the rest of the season with injury.
Contract talks between 25 year old Onana and Ajax broke down in September and he appeared set to leave at the end of the season.
Sporting director Marc Overmars told the club website while explaining the apparent change of heart that the club’s needs are paramount
Onana has missed almost the whole of 2021 after being banned for a doping violation by Uefa, but is free to play again from 4 November.
Ajax supported him in appealing the ban and Onana’s suspension was subsequently reduced to nine months.
Leave feedback about this