diff -r dfe9c0c10a2c xen/arch/x86/hvm/vpt.c
--- a/xen/arch/x86/hvm/vpt.c	Mon Nov 05 13:23:55 2007 +0000
+++ b/xen/arch/x86/hvm/vpt.c	Wed Nov 07 08:55:45 2007 -0500
@@ -59,7 +59,7 @@ static void pt_process_missed_ticks(stru
     if ( mode_is(pt->vcpu->domain, no_missed_tick_accounting) )
     {
         pt->pending_intr_nr = 1;
-        pt->scheduled = now + pt->scheduled;
+        pt->scheduled = now + pt->period;
     }
     else
     {