diff --git a/hw/ppc440_bamboo.c b/hw/ppc440_bamboo.c
index aa9f594..db96f14 100644
--- a/hw/ppc440_bamboo.c
+++ b/hw/ppc440_bamboo.c
@@ -183,6 +183,18 @@ static QEMUMachine bamboo_machine_v0_12 = {
     .name = "bamboo-0.12",
     .desc = "bamboo",
     .init = bamboo_init,
+    .compat_props = (GlobalProperty[]) {
+        {
+            .driver   = "virtio-serial-pci",
+            .property = "max_nr_ports",
+            .value    = stringify(1),
+        },{
+            .driver   = "virtio-serial-pci",
+            .property = "vectors",
+            .value    = stringify(0),
+        },
+        { /* end of list */ }
+    },
 };
 
 static void bamboo_machine_init(void)