diff --git a/systemimg_packer_unpacker/README.md b/systemimg_packer_unpacker/README.md
new file mode 100644
index 0000000..1719c55
--- /dev/null
+++ b/systemimg_packer_unpacker/README.md
@@ -0,0 +1 @@
+Notice: unpacker works fine, but packer didn't work as expected.