diff --git a/hw/virtio-serial-bus.c b/hw/virtio-serial-bus.c
index 403268fa30..ab456ea396 100644
--- a/hw/virtio-serial-bus.c
+++ b/hw/virtio-serial-bus.c
@@ -445,8 +445,7 @@ static VirtIOSerialBus *virtser_bus_new(DeviceState *dev)
 {
     VirtIOSerialBus *bus;
 
-    bus = FROM_QBUS(VirtIOSerialBus, qbus_create(&virtser_bus_info, dev,
-                                                 "virtio-serial-bus"));
+    bus = FROM_QBUS(VirtIOSerialBus, qbus_create(&virtser_bus_info, dev, NULL));
     bus->qbus.allow_hotplug = 1;
 
     return bus;