Similarities between the popular flag design Red Peak and the logo of an American engineering firm have been pointed out.
Peak Engineering in North Carolina has been using a logo featuring a red triangle, white chevron and two black triangles, since 2008.
Red Peak, the design that has seen a swell of support for inclusion in the referendum for a new New Zealand flag, is similar, but has a blue triangle in place of one black triangle.
Company owners Beth and Jeff Roach told Fairfax they thought their company logo's similarity to Red Peak was "curious".
"It's obviously caught us by surprise. . . and we were even more surprised that people had nicknamed it 'red peak'. Obviously we're very flattered!" Mrs Roach said.
The couple had received an email about the flag debate from a Kiwi on Wednesday. Mrs Roach said she deleted the email, but more came through.