Isolated pump erosion is a rare complication in patients with inflatable penile prosthesis. We describe a case of a diabetic patient who underwent inflatable penile prosthesis implantation with subsequent isolated pump erosion. Repeated attempts of conservative repair of the erosion failed. Finally, the inflatable penile prosthesis was replaced with a malleable one to avoid new pump erosion. In case of isolated pump erosion, replacement of the inflatable penile prosthesis with a malleable one looks to be a good alternative salvage treatment for the patient.