In the TV3 Reid-Research poll - released last night - Kiwis were asked whether they wanted change now that they had seen the final four alternative flag options.
Only 25 percent said yes, while the majority said no.
But PM Key - who has previously voiced his support for the silver fern on the flag - said the question asked was too basic, as there were people who had yet to make up their minds.
He told Morning Report fewer than 50 percent of people want to keep the current flag, and that number was falling.
