diff --git a/hw/misc/vfio.c b/hw/misc/vfio.c
index fd318a122daf84773a116fcbdc4f743c01e7b3a2..7bff62c2c322c5c16a6d187a44c24670123c6dee 100644
--- a/hw/misc/vfio.c
+++ b/hw/misc/vfio.c
@@ -4049,6 +4049,7 @@ static void vfio_put_device(VFIODevice *vdev)
     DPRINTF("vfio_put_device: close vdev->fd\n");
     close(vdev->fd);
     if (vdev->msix) {
+        object_unparent(OBJECT(&vdev->msix->mmap_mem));
         g_free(vdev->msix);
         vdev->msix = NULL;
     }