The range-separated GGA hybrid ωB97X-V is a 10 parameter functional containing range-corrected B97 exchange, B97 correlation, and the non-local VV10 functional, with the parameters chosen to minimize the error in both the training and validation datasets considered. This method was then extended to produce the range-separated meta-GGA hybrid ωB97M-V, utilizing the large MGCDB84 database for optimization, and including meta-GGA components in the optimization, as well as an MP2 energy correction in ωB97M(2). Following this approach we set out to create a range-separated hybrid functional of the form ωB97X-osUW12 using the ωB97 functional together with opposite-spin UW12 correlation and a dispersion correction. We do not include any meta-GGA contribution in this work, but note that this could be included in the future.