diff --git a/xos/configurations/cord-pod/README-Tutorial.md b/xos/configurations/cord-pod/README-Tutorial.md
index b07d19c..1e3def3 100644
--- a/xos/configurations/cord-pod/README-Tutorial.md
+++ b/xos/configurations/cord-pod/README-Tutorial.md
@@ -63,6 +63,16 @@
         - ./id_rsa:/opt/xos/synchronizers/exampleservice/exampleservice_private_key:ro
 ```
 
+Also, add ExampleService's public key to the `volumes` section of the `xos` docker container:
+
+```
+xos:
+    ...
+    volumes:
+        ...
+        - ./id_rsa.pub:/opt/xos/synchronizers/exampleservice/exampleservice_public_key:ro 
+```
+
 ## Bring up XOS
 
 Under the `cord-pod` configuration, edit file `make-vtn-networkconfig-json.sh`.