diff --git a/model/css-sgi575.sh b/model/css-sgi575.sh
index 6681ee5..873baba 100644
--- a/model/css-sgi575.sh
+++ b/model/css-sgi575.sh
@@ -9,6 +9,7 @@
 
 cat <<EOF >"$model_param_file"
 -C board.flashloader0.fname=$fip_bin
+-C board.virtioblockdevice.image_path=$busybox_bin
 -C css.cmn600.force_rnsam_internal=false
 -C css.cmn600.mesh_config_file=SGI-575_cmn600.yml
 -C css.gic_distributor.ITS-device-bits=20