Key indicators: single-crystal X-ray study; T = 296 K; mean (C-C) = 0.008 Å; R factor = 0.037; wR factor = 0.074; data-to-parameter ratio = 17.0.The title Schiff base, C 17 H 19 IN 2 O, is not planar, displaying a dihedral angle of 34.9 (2) between the two aromatic rings. The molecular conformation allows the formation of a strong intramolecular O-HÁ Á ÁN hydrogen bond with graph-set motif S(6) between the hydroxy group and the imine N atom.