In this paper, we propose a new patching scheme, called P2Prefix patching, to improve the performance of the typical patching technique by using both the prefix patching from clients and the regular stream multicast from the server. In our proposed scheme, each client plays the role of a patching server to serve a prefix stream to other clients that request the same video stream. As a result of removing the patching channels from the server, the server bandwidth usage can be reduced. In the performance study, we show that our patching scheme requires less server bandwidth than the existing patching techniques.