diff --git a/examples/grow21/README.md b/examples/grow21/README.md
index fe66f64..662e894 100644
--- a/examples/grow21/README.md
+++ b/examples/grow21/README.md
@@ -4,6 +4,7 @@
   * ./server
   * ./client
   * cloak/src/server
+* Copy `cloak.js` into `./client/lib`
 * Run `./run.sh`
 * Run `node ./client/test-server.js` or a server of your choice