A South African court on Tuesday postponed a long-delayed corruption trial against former president Jacob Zuma to Sept. 9, following his hospitalisation.

High Court Judge Piet Koen granted the postponement and also ordered Zuma’s team to produce a medical report by Aug. 20, and for the state to appoint a medical doctor to assess whether Zuma was fit to stand trial.

Zuma’s sentence in July on a separate contempt of court matter led to a wave of looting and unrest.

He was expected to appear at the Pietermaritzburg High Court on Tuesday on a two billion dollars arms deal corruption case that led to his sack as South Africa’s deputy president in 2005.

Zuma, 79, is serving a 15-month sentence at Estcourt prison in his home province of KwaZulu-Natal after he failed to heed a court order to attend an inquiry in corruption during his time as president.

He was moved to a hospital on Friday for medical observation.

In the dock with French arms firm Thales, Zuma is facing charges of corruption, money laundering and tax evasion related to the arms deal from the 1990s.