diff --git a/lib/functions/host/prepare-host.sh b/lib/functions/host/prepare-host.sh
index 829f94d136..2ae5d8579b 100644
--- a/lib/functions/host/prepare-host.sh
+++ b/lib/functions/host/prepare-host.sh
@@ -246,6 +246,7 @@ function adaptative_prepare_host_dependencies() {
 		patchutils pkg-config pv
 		qemu-user-static
 		rsync
+		swig # swig is needed for some u-boot's. example: "bananapi.conf"
 		u-boot-tools
 		udev # causes initramfs rebuild, but is usually pre-installed.
 		uuid-dev