In the title compound, C(13)H(13)NO(2)S, the dihedral angle between the aromatic rings is 68.4 (1)°. In the crystal, the molecules are linked into inversion dimers by pairs of N-H⋯O hydrogen bonds. The unit cell of this compound was reported previously [Oh et al. (1985 ▶). Chung. Kwa. Yong. (Chung. J. Sci.), 12, 67] but no atomic coordinates were established in the earlier study.