diff --git a/hw/m68k/q800.c b/hw/m68k/q800.c
index b22651931a..a32e6fbf8d 100644
--- a/hw/m68k/q800.c
+++ b/hw/m68k/q800.c
@@ -448,7 +448,7 @@ static void q800_machine_init(MachineState *machine)
                           qdev_get_gpio_in_named(DEVICE(&m->via2), "nubus-irq",
                                                  VIA2_NUBUS_IRQ_9));
 
-    nubus = &NUBUS_BRIDGE(dev)->bus;
+    nubus = NUBUS_BUS(qdev_get_child_bus(dev, "nubus-bus.0"));
 
     /* framebuffer in nubus slot #9 */