Māori Television show Native Affairs is being cut down from one hour to 30 minutes but it says no jobs will be lost.
The 10th season of the popular current affairs show will feature the same number of stories, but in a shorter format.
Māori Television head of news and current affairs Maramena Roderick said it was responding to research which found that audiences wanted shorter and sharper stories.
By March 2016, the show will be solely presented by current co-host Billie-Jo Hohepa Ropiha.
Ms Roderick said the other co-host, Ward Kamo, would become an independent contributor.
Labour's Māori broadcasting spokesperson Peeni Henare said the new format reduced the show's ability to advocate for Māori and hold people in positions of power to account.