The Court of Appeal in South Africa on Monday opened the way for prosecutors to pursue graft charges against ruling party leader Jacob Zuma.
The court overturned a decision by a High Court judge on 12 September to dismiss graft charges against Mr Zuma, who is the leader of the African National Congress.
Mr Zuma is expected to stand for election as president in April.
The Supreme Court of Appeal said High Court judge Chris Nicholson made several errors in a ruling in which he dismissed bribery, fraud and other charges against Mr Zuma.
The ruling in September split the party which has been in power since apartheid ended in 1994.
Supporters of former President Thabo Mbeki have since formed a dissident party, COPE, which poses the first real challenge to the ANC in 15 years.