diff --git a/tools/kvm/virtio/pci.c b/tools/kvm/virtio/pci.c
index 0ae93fb..6b27ff8 100644
--- a/tools/kvm/virtio/pci.c
+++ b/tools/kvm/virtio/pci.c
@@ -116,8 +116,7 @@ static bool virtio_pci__io_in(struct ioport *ioport, struct kvm *kvm, u16 port,
 		break;
 	case VIRTIO_PCI_QUEUE_NUM:
 		val = vtrans->virtio_ops->get_size_vq(kvm, vpci->dev, vpci->queue_selector);
-		ioport__write32(data, val);
-		break;
+		ioport__write16(data, val);
 		break;
 	case VIRTIO_PCI_STATUS:
 		ioport__write8(data, vpci->status);