While most websites display boring, stock standard 404 messages when you reach a page with no content on it, the Labour Party web developers decided to go a different way.
Possibly hoping that many undecided or National-voters would wander down the wrong corners of the internet, Labour decided to make its 404 error message a dig at National.
"Oops! Like National's plan to fix the housing crisis, this page doesn't exist," the website tells you when you visit a wrong page.
It then links users to Labour's housing plan.
A screenshot of the page is being shared widely across social media.