In the title mol-ecule, C(20)H(16)N(2)O(2), the benzimidazole mean plane forms dihedral angles of 56.55 (3) and 81.65 (4)° with the two benzene rings. In the crystal structure, inter-molecular O-H⋯O and O-H⋯N hydrogen bonds link the mol-ecules into layers parallel to the (101) plane. The crystal packing also exhibits weak inter-molecular C-H⋯O and C-H⋯π inter-actions.