diff --git a/qemu/qemu-kernel.go b/qemu/qemu-kernel.go
index 1b643de..759877e 100644
--- a/qemu/qemu-kernel.go
+++ b/qemu/qemu-kernel.go
@@ -125,7 +125,7 @@ func getRandomAddrPort() (addr string) {
 
 func getRandomPort(ip string) (addr string) {
 	// ip:1024-65535
-	port := rand.Int()%(65535-1024) + 1024
+	port := rand.Int()%(65536-1024) + 1024
 	return fmt.Sprintf("%s:%d", ip, port)
 }