Edward Mkhosi, select committee co-chairman of the MDC formation of Industry Minister Welshman Ncube, said Constitutional Affairs Minister Eric Matinenga will release a statement on Saturday confirming the conclusion of the draft constitution.
Mkhosi said the draft reflects views collected from people nationwide during the outreach phase.
Mr. Mugabe, who is 88 and has ruled Zimbabwe since independence in 1980, has insisted on elections being held in March while Mr. Tsvangirai wanted reforms first to allow for fair and violence-free polls.
Mr Tsvangirai, 60, pulled out of a presidential run-off election in 2008, citing the killing of about 300 supporters. The Southern African Development Community and the African Union are gurantors of the Global Political Agreement that led to the formation of the coalition government.