diff --git a/README.md b/README.md
index 64e01aa..65de6f5 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@
 ```
 * To install the *nova-compute* service on the compute nodes that were added to Juju, run on the control machine:
 ```
-$ ansible-playbook foo-compute.yaml
+$ ansible-playbook -i foo-hosts foo-compute.yaml
 ```
 
 ## Things to note