diff --git a/Documentation/REST-API/Resources-Server.md b/Documentation/REST-API/Resources-Server.md
index d3f939097..a7056c0b9 100644
--- a/Documentation/REST-API/Resources-Server.md
+++ b/Documentation/REST-API/Resources-Server.md
@@ -241,6 +241,10 @@ least the following fields.
 * `data.type`
   * Type of the object, must be `servers`
 
+* `data.attributes.parameters.protocol`
+  * The [`protocol`](../Getting-Started/Configuration-Guide.md#protocol) to use.
+    Must be defined.
+
 * `data.attributes.parameters.address` OR `data.attributes.parameters.socket`
   * The [`address`](../Getting-Started/Configuration-Guide.md#address) or
     [`socket`](../Getting-Started/Configuration-Guide.md#socket) to use. Only
@@ -250,7 +254,6 @@ least the following fields.
   * The [`port`](../Getting-Started/Configuration-Guide.md#port) to use. Needs
     to be defined if the `address` field is defined.
 
-
 The following is the minimal required JSON object for defining a new server.
 
 ```javascript
diff --git a/Documentation/Release-Notes/MaxScale-2.4.0-Release-Notes.md b/Documentation/Release-Notes/MaxScale-2.4.0-Release-Notes.md
index 33148302e..f6f5a0776 100644
--- a/Documentation/Release-Notes/MaxScale-2.4.0-Release-Notes.md
+++ b/Documentation/Release-Notes/MaxScale-2.4.0-Release-Notes.md
@@ -45,6 +45,12 @@ improvement over the older MD5 hashing algorithm. New users will use the
 stronger algorithm but old users will continue using the weaker one. To upgrade
 administrative users, recreate the user.
 
+### REST API - Server creation
+
+The `protocol` parameter must now always be defined when a server is
+created. The previously undocumented default value of `mariadbbackend` now must
+be explicitly defined when a server is created via the REST API.
+
 ## Dropped Features
 
 ### `debugcli` and `telnetd`