In the racemic title compound, C10H15NOS, the packing exhibits centrosymmetric pairs of molecules linked by N-H center dot center dot center dot O=S hydrogen bonds in a head-to-tail fashion. The N-Caryl bond [1.4083 (12) angstrom] is considerably shorter than the N-Calkyl bonds typically found in N-alkylalkanesulfinamides (1.470-1.530 angstrom).