The Labour Party's largest affiliated union has decided to support its former national secretary Andrew Little to lead the party.
The Engineering, Printing and Manufacturing Union's national executive has recommended to its conference delegates that they give Mr Little their first preference in the Labour leadership ballot.
Under its rules the delegates to its last conference vote on the leadership.
Union national secretary Bill Newsom said it was giving no direction to the delegates about how they should rank the other Labour candidates - Grant Robertson, David Parker and Nanaia Mahuta.
In a statement the EPMU said the delegates, who vote on behalf of all members of the union, were encouraged to seek feedback from fellow union members before voting.