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In the title compound, C13H12O, the cyclopentene ring fused with the naphthalene group adopts an envelope conformation. The cyclopentene torsion angle, with the fusion bond at the centre, has a magnitude of 1.16 (16)°. In the crystal, neighbouring molecules are connected through O—H...O hydrogen bonds into an R44(8) ring motif. The crystal packing also features weak π–π stacking interactions [centroid–centroid distance = 3.8981 (8) Å] and C—H...π interactions.