diff --git a/server/controllers/system/add-custom-field.php b/server/controllers/system/add-custom-field.php
index 4a6d6233..894c3cee 100644
--- a/server/controllers/system/add-custom-field.php
+++ b/server/controllers/system/add-custom-field.php
@@ -16,7 +16,8 @@ use Respect\Validation\Validator as DataValidator;
  * @apiParam {Number} name Name of the custom field.
  * @apiParam {String} type One of 'text' and 'select'.
  * @apiParam {String} options JSON array of strings with the option names.
- *
+ * @apiParam {String} description Description of the custom field.
+
  * @apiUse NO_PERMISSION
  * @apiUse INVALID_NAME
  * @apiUse INVALID_CUSTOM_FIELD_TYPE