--- xen-4.5.1/tools/qemu-xen-traditional/vnc.c.orig 2015-07-12 21:55:32.875504811 +0100
+++ xen-4.5.1/tools/qemu-xen-traditional/vnc.c 2015-07-12 22:03:03.860005391 +0100
@@ -2140,7 +2140,7 @@
static int vnc_set_gnutls_priority(gnutls_session_t s, int x509)
{
- const char *priority = x509 ? "NORMAL" : "NORMAL:+ANON-DH";
+ const char *priority = x509 ? "@SYSTEM" : "@SYSTEM:+ANON-DH";
int rc;
rc = gnutls_priority_set_direct(s, priority, NULL);