The iliac crest is a common donor site for autogenous bone grafts. Among the reported complications, lumbar hernias occur infrequently with a reported incidence of 5% to 9%. Surgical repair is advocated secondary to the risk of incarceration or strangulation. Computed tomography is the diagnostic study of choice. Various transabdominal, retroperitoneal, and laparo-scopic approaches have been described for the repair of lumbar hernias. We describe a case of successful lumbar incisional hernia repair after iliac crest bone graft harvesting that used prosthetic mesh.