A dummy conversion bracket is used with a lockset having an interior assembly, an exterior assembly, and a thumbpiece. The thumbpiece is pivotally coupled to the exterior assembly and includes a tab that extends through the exterior assembly. The bracket comprises a blocking member disposed between the interior assembly and the exterior assembly. The blocking member is coupled to the exterior assembly and includes an aperture for receiving the tab. The aperture is configured to prevent the thumbpiece from pivoting relative to the exterior assembly.