While it is uncontroversial that Kantian constructivism has implications for normative ethics, its status as a metaethical view has been contested. In this article, I provide a characterisation of metaethical Kantian constructivism that withstands these criticisms. I start by offering a partial defence of Sharon Street’s practical standpoint characterisation. However, I argue that this characterisation, as presented by Street, is ultimately incomplete because it fails to demonstrate that the claims of Kantian constructivism constitute a distinctive contribution to metaethics. I then (...) try to complete the practical standpoint characterisation by elaborating on Christine Korsgaard’s suggestion that metaethical Kantian constructivism takes up a position on the source of morality’s normativity. (shrink)