diff --git a/hw/char/virtio-serial-bus.c b/hw/char/virtio-serial-bus.c
index f9a4428bd6..cf08ef9728 100644
--- a/hw/char/virtio-serial-bus.c
+++ b/hw/char/virtio-serial-bus.c
@@ -843,10 +843,6 @@ static Property virtser_props[] = {
     DEFINE_PROP_END_OF_LIST()
 };
 
-#define TYPE_VIRTIO_SERIAL_BUS "virtio-serial-bus"
-#define VIRTIO_SERIAL_BUS(obj) \
-      OBJECT_CHECK(VirtIOSerialBus, (obj), TYPE_VIRTIO_SERIAL_BUS)
-
 static void virtser_bus_class_init(ObjectClass *klass, void *data)
 {
     BusClass *k = BUS_CLASS(klass);
diff --git a/include/hw/virtio/virtio-serial.h b/include/hw/virtio/virtio-serial.h
index ed3e916b68..448615a6b3 100644
--- a/include/hw/virtio/virtio-serial.h
+++ b/include/hw/virtio/virtio-serial.h
@@ -33,7 +33,12 @@ struct virtio_serial_conf {
      OBJECT_GET_CLASS(VirtIOSerialPortClass, (obj), TYPE_VIRTIO_SERIAL_PORT)
 
 typedef struct VirtIOSerial VirtIOSerial;
+
+#define TYPE_VIRTIO_SERIAL_BUS "virtio-serial-bus"
 typedef struct VirtIOSerialBus VirtIOSerialBus;
+#define VIRTIO_SERIAL_BUS(obj) \
+      OBJECT_CHECK(VirtIOSerialBus, (obj), TYPE_VIRTIO_SERIAL_BUS)
+
 typedef struct VirtIOSerialPort VirtIOSerialPort;
 
 typedef struct VirtIOSerialPortClass {