In this paper, an alternative method for the fabrication of ZnO nanowires with excellent crystallinity is presented. With the inclusion of In in the growth process, we show that the morphology of the end products can be changed from nanopins to nanowires. In addition, we point out that the effects of In inclusion can improve crystalline quality of ZnO, and suppress defect density. Our results shown here pave a new route for the creation of high quality optoelectronic devices based on ZnO nanostructures.