diff --git a/Documentation/Getting-Started/Configuration-Guide.md b/Documentation/Getting-Started/Configuration-Guide.md
index b08710e24..d6185e694 100644
--- a/Documentation/Getting-Started/Configuration-Guide.md
+++ b/Documentation/Getting-Started/Configuration-Guide.md
@@ -196,6 +196,15 @@ write or modify the data in the backend server. The default is 2 seconds.
 auth_write_timeout=10
 ```
 
+#### `passive`
+
+Controls whether MaxScale is a passive node in a cluster of multiple MaxScale
+instances. The default value is false.
+
+This parameter is intended to be used with multiple MaxScale instances that use
+failover functionality to manipulate the cluster in some form. Passive nodes
+only observe the clusters being monitored and take no direct actions.
+
 #### `ms_timestamp`
 
 Enable or disable the high precision timestamps in logfiles. Enabling this adds
diff --git a/Documentation/REST-API/Resources-MaxScale.md b/Documentation/REST-API/Resources-MaxScale.md
index 9f0540644..287ca8762 100644
--- a/Documentation/REST-API/Resources-MaxScale.md
+++ b/Documentation/REST-API/Resources-MaxScale.md
@@ -75,6 +75,7 @@ Update MaxScale parameters. The request body must define updated values for the
 - [auth_read_timeout](../Getting-Started/Configuration-Guide.md#auth_read_timeout)
 - [auth_write_timeout](../Getting-Started/Configuration-Guide.md#auth_write_timeout)
 - [admin_log_auth_failures](../Getting-Started/Configuration-Guide.md#admin_log_auth_failures)
+- [passive](../Getting-Started/Configuration-Guide.md#passive)
 
 ```
 PATCH /v1/maxscale