South Africa’s Supreme Court of Appeal on Friday upheld a High Court ruling to reinstate nearly 800 corruption charges filed against Jacob Zuma before he became president.

Zuma, who has faced and denied numerous other corruption allegations since taking office, said he was disappointed by the court’s decision and asked the National Prosecuting Authority (NPA) to “consider representations” before deciding whether to proceed against him.

It was unclear when the NPA would make a decision on the charges, which relate to a 30 billion rand ($2 billion) government arms deal arranged in the late 1990s.

The ruling is likely to amplify calls for Zuma, 75, to step down before his term as president ends in 2019 and diminish his influence over who succeeds him when the ruling African National Congress (ANC) chooses a new leader in December.

Friday’s unanimous Supreme Court ruling upheld a High Court decision in April 2016 that the charges against Zuma should be reinstated. They had been set aside in April 2009 by the then-head of the prosecuting authority, paving the way for Zuma to run for president later that year.

Rejecting an appeal brought by Zuma and the NPA, Judge Lorimer Leach said it was “irrational” for the NPA to have set the charges aside — the same word used by the High Court.

Zuma is unpopular with many investors after sacking respected finance minister Pravin Gordhan in March, a move that hit South African financial assets and helped tip the country’s credit ratings into “junk” territory.

Zuma has faced persistent corruption allegations, most recently over leaked emails that suggest his friends the Gupta family may have used their influence to secure lucrative state contracts for their companies. Read the full story here.