In this paper, we study normative multi-agent systems from a supervisory control theory perspective. Concretely, we show how to model three well-known types of norm enforcement mechanisms by adopting well-studied supervisory control theory techniques for discrete event systems. Doing so provides a semantics for normative multi-agent systems rooted in formal languages and the ability to automatically synthesize SCT-based norm enforcement mechanisms for special, but still fairly expressive, type of systems and properties.