--- original/xen-unstable.hg/xen/arch/x86/io_apic.c	2005-08-23 05:49:12.592038632 -0400
+++ xen-unstable.hg/xen/arch/x86/io_apic.c	2005-08-23 04:53:13.000000000 -0400
@@ -1753,6 +1753,8 @@ int ioapic_guest_write(int apicid, int a
 
     rte.dest.logical.logical_dest = cpu_mask_to_apicid(TARGET_CPUS);
     *(int *)&rte = val;
+    rte.delivery_mode = INT_DELIVERY_MODE;
+    rte.dest_mode = INT_DEST_MODE;
 
     if ( rte.vector >= FIRST_DEVICE_VECTOR )
     {