Those who criticize as well as those who nowadays defend constructivism in metaethics consider John Rawls’s constructivism to be incomplete. According to them, his ontological agnosticism makes evident this incompleteness; I question this widely accepted charge. I propose an alternative interpretation, according to which Rawls’s agnosticism is the effect of his metaethics rather than a lack of metaethics. Thanks to this interpretation, I question the originality and attractiveness of Rawls’s metaethics. My claim is that Rawls’s metaethics adequately captures the specific historical nature of political norms.