The boundary of the Napier electorate has been extended further north as part of a series of nationwide changes to be put in place for September's general election.
The shift of the northern boundary brings about 1500 rural voters into the area who were previously on the roll of the adjoining East Coast electorate, which includes Gisborne.
The change is good news for Napier's National Party candidate, Wayne Walford, because the majority of voters in polling stations in the affected area supported National in the 2011 general election.
Sitting National MP Chris Tremain is stepping down at the election and Mr Walford is up against former Labour list MP Stuart Nash in the battle for the Napier seat.
Mr Nash contested the seat in 2011, losing to Mr Tremain by 3701 votes. The Electoral Commission reviewed the country's electorate boundaries following last year's Census.