In his Critical Sociology essay on Piero Sraffa’s Production of Commodities by Means of Commodities, William Jefferies aims to rescue Marx’s labor value analysis by demonstrating the purported inadequacy of the Sraffa model. Jefferies’s argument is untenable, however; for it rests upon a thoroughly confused caricature of Sraffa’s analytical framework. The present comment argues that, far from undermining Marx, Sraffa provides a way to place Marx’s project on solid foundations.