diff --git a/README.rst b/README.rst
index 72b2f4e..2ca9873 100644
--- a/README.rst
+++ b/README.rst
@@ -19,6 +19,7 @@
         enabled: true
         version: juno
         default_volume_type: 7k2SaS
+        availability_zone_fallback: True
         database:
           engine: mysql
           host: 127.0.0.1