The Department of Corrections says it received no indication from Maori rehabilitation providers that its programme was lacking Maori focus.
The Mauri Tu Pae programme was recently re-written and rolled out in the five Maori Focus Units around the country, which house about 300 men.
One of its authors, Hinewirangi Kohu-Morgan, says only 40% of the new content is based on Maori values and tikanga, which is a step up from past versions, but is still not enough.
The department's assistant general manager for programme design and implementation David Wales says there is more Maori content than that and concerns about the level of Maori content haven't been raised.
He says there was a lot of collaboration with Maori providers when writing the programme, which is still in its early stages.