Immigrants without citizenship are usually excluded from democratic participation. It is often argued that this is a grave injustice that calls for redress; immigrants should be enfranchised whether they have citizenship or not. Most arguments for this claim hold that immigrant enfranchisement is justified by immigrants’ interest against being ruled by the receiving state. In this article, I argue that this view fails to explain why immigrants should be enfranchised. I offer an alternative view according to which immigrant enfranchisement is justified by a shared interest of immigrants and citizens in relating as mutually serving agents of justice by participating in the common undertaking of ruling the polity justly together.