Functional Magnetic Resonance Imaging (fMRI) facilitates the presurgical planning of awake craniotomies, but its use during the procedures remains limited. During intraoperative brain mapping by direct cortical electrical stimulation (DCS), fMRI is typically displayed separately or mentally recalled. The use of fMRI data in this manner is difficult and is further complicated by brain deformation or "shift". An image registration pipeline is presented that addresses this issue by providing covisualization of fMRI and DCS with acceptable accuracy for intraoperative use. This visualization method has the potential to improve the workflow of intraoperative brain mapping.