diff --git a/lib/models/acl.js b/lib/models/acl.js
index 6b0562d8..c62ac0fe 100644
--- a/lib/models/acl.js
+++ b/lib/models/acl.js
@@ -269,6 +269,11 @@ Scope.checkPermission = function (scope, model, property, accessType, callback)
 /**
  * Check if the request has the permission to access
  * @param {Object} context
+ * @property {Object[]} principals An array of principals
+ * @property {String|Model} model The model name or model class
+ * @property {*} id The model instance id
+ * @property {String} property The property/method/relation name
+ * @property {String} accessType The access type
  * @param {Function} callback
  */
 ACL.checkAccess = function (context, callback) {