This paper shows that Locke anticipates key features of Hume's more celebrated analysis of convention. It does so by developing Lenz's account of Lockean (linguistic) convention and its normativity, as presented in Socializing Minds. Locke's account of linguistic convention shares structural features also visible in Locke's treatment of the convention of money and property. The paper shows that Locke's ‘Humean' account of convention responds to a lacuna in Pufendorf’s treatment of linguistic convention that Lenz argues is significant to Locke.