Updated

The U.N. human rights envoy to Myanmar has expressed concern over the military's veto power on constitutional changes, which he says are crucial for the country's democratic transition.

The 2008 constitution, drawn up under the previous junta regime, gives the military a mandatory 25 percent parliamentary seats, which is enough to veto any constitution change and disqualify pro-democracy leader Aung San Suu Kyi from running for president.

U.N. Special Rapporteur Tomas Ojea Quintana said in a statement Saturday that the military's veto power over constitutional amendments does not augur well for the 2015 elections. He says there must be civilian oversight over the military.

Suu Kyi has been campaigning for constitutional changes since last year.