diff --git a/live-build/auto/config b/live-build/auto/config
index 8c749ec6..1faf049b 100755
--- a/live-build/auto/config
+++ b/live-build/auto/config
@@ -694,6 +694,7 @@ esac
 lb config noauto \
 	--mode ubuntu \
 	--distribution "$SUITE" \
+	--iso-preparer "livecd-rootfs" \
 	--bootstrap-keyring ubuntu-keyring \
 	--binary-images "$BINARY_IMAGES" \
 	--memtest "$MEMTEST" \