diff --git a/js/tools/build/.gitignore b/js/tools/build/.gitignore
new file mode 100644
index 0000000..6faf4d3
--- /dev/null
+++ b/js/tools/build/.gitignore
@@ -0,0 +1,2 @@
+ndn-js-uncomp.js
+ndn-js.js