--- xen-4.3.0.orig/tools/qemu-xen/ui/vnc.c
+++ xen-4.3.0/tools/qemu-xen/ui/vnc.c
@@ -3121,7 +3121,7 @@
      */
     if (password) {
 #ifdef CONFIG_VNC_TLS
-        if (tls) {
+        if (0) {
             vs->auth = VNC_AUTH_VENCRYPT;
             if (x509) {
                 VNC_DEBUG("Initializing VNC server with x509 password auth\n");