In Morality and Socially Constructed Norms, Laura Valentini argues that moral obligations to respect social norms can be explained without invoking the concept of ‘joint commitment.’ Her resulting account is, in one important sense, individualistic, and therefore struggles to account for widely held intuitions about the normative significance of social norms. I argue that we can rescue the notion of joint commitment from Valentini’s objections, and incorporate it into a version of her account that preserves its insights.