The reaction rate constant for the radiative association of O(P-3) and H(S-2) has been calculated by combining a few different methods and taking account of both direct and resonance-mediated pathways. The latter includes both shape resonances and Feshbach type inverse predissociation. The reaction rate constant is expressed as a function of temperature in the interval 10-30000 K. This reaction may be astrochemically relevant and is expected to be of use in astrochemical networks.