diff --git a/readme-vars.yml b/readme-vars.yml
index a208873..eecd71c 100644
--- a/readme-vars.yml
+++ b/readme-vars.yml
@@ -26,7 +26,7 @@ param_env_vars:
   - { env_var: "TZ", env_value: "Europe/London", desc: "Specify a timezone to use EG Europe/London"}
 opt_param_usage_include_env: true
 opt_param_env_vars:
-  - { env_var: "MASTER_URL", env_value: "http://{{master}}:80/smokeping/", desc: "Specify the master url to connect to. Used when in slave mode."}
+  - { env_var: "MASTER_URL", env_value: "http://<master-host-ip>:80/smokeping/", desc: "Specify the master url to connect to. Used when in slave mode."}
   - { env_var: "SHARED_SECRET", env_value: "password", desc: "Specify the master shared secret for this host. Used when in slave mode."}
   - { env_var: "CACHE_DIR", env_value: "/tmp", desc: "Specify the cache directory for this host. Used when in slave mode."}