diff --git a/hw/virtio-serial-bus.c b/hw/virtio-serial-bus.c
index bb11a9bf3d..8efba0bf85 100644
--- a/hw/virtio-serial-bus.c
+++ b/hw/virtio-serial-bus.c
@@ -354,7 +354,10 @@ static void handle_input(VirtIODevice *vdev, VirtQueue *vq)
 
 static uint32_t get_features(VirtIODevice *vdev, uint32_t features)
 {
-    VirtIOSerial *vser = DO_UPCAST(VirtIOSerial, vdev, vdev);
+    VirtIOSerial *vser;
+
+    vser = DO_UPCAST(VirtIOSerial, vdev, vdev);
+
     if (vser->bus->max_nr_ports > 1) {
         features |= (1 << VIRTIO_CONSOLE_F_MULTIPORT);
     }