diff --git a/board/myna-player-odyssey/scripts/rootfs_postimage.sh b/board/myna-player-odyssey/scripts/rootfs_postimage.sh
index b2168fa..f6507d6 100755
--- a/board/myna-player-odyssey/scripts/rootfs_postimage.sh
+++ b/board/myna-player-odyssey/scripts/rootfs_postimage.sh
@@ -11,6 +11,12 @@
 	"${BINARIES_DIR}"/zImage \
 	"${BINARIES_DIR}"/kernel
 
+# compress them into a tarball for rauc
+tar -cJf \
+	"${BINARIES_DIR}"/kernel.tar.xz \
+	-C "${BINARIES_DIR}"/kernel \
+	.
+
 # prepare for genimage
 cd "${BINARIES_DIR}"
 export GENIMAGE_TMP=${BR2_EXTERNAL_MynaPlayer_PATH}/board/myna-player-odyssey/utilities/genimage.tmp