Emmerson Mnangagwa will retain his position as Justice Minister in addition to being vice president.
A report by then High Court Judge Dikgang Moseneke and Sisi Khampepe was released this week.
The opposition leader says President Robert Mugabe used diamond money to sway the election.
MDC leader Morgan Tsvangirai has dismissed his third consecutive defeat by Mugabe as fraud.
Morgan Tsvangirai said the change Zimbabwe seeks is not like instant coffee.
President Robert Mugabe says Morgan Tsvangirai’s MDC should have cooperated with Zanu-PF.