Prime Minister John Key says Social Housing Minister Paula Bennett should not have shared personal details about the head of an Auckland marae which is caring for homeless people.
But he is backing his under-pressure minister, saying he has "huge confidence" in her.
Mrs Bennett's office was last week accused by Opposition MPs of trying to smear Te Puea Marae chairman Hurimoana Dennis.
Her office gave information to a journalist about a police investigation into the handling of a case by Mr Dennis.
Speaking to Radio New Zealand this morning, Mr Key said that "in principle" Mrs Bennett should not have shared the information.