My goal in this article is to provide support for the claim that moral flaws can be detrimental to an artwork's aesthetic value. I argue that moral flaws can become aesthetic flaws when they defeat the operation of good-making aesthetic properties. I do not defend a new theory of aesthetic properties or aesthetic value; instead, I attempt to show that on both the response-dependence and the supervenience account of aesthetic properties, moral flaws with an artwork are relevant to what aesthetic (...) properties obtain. I provide a description of the main features of both theories of aesthetic properties, and then explain how moral flaws can become aesthetic flaws on either account. I address several objections to moralism about art including the "moralistic fallacy.". (shrink)