diff --git a/framework/yii/data/Sort.php b/framework/yii/data/Sort.php
index 78fe2e0..5eb031e 100644
--- a/framework/yii/data/Sort.php
+++ b/framework/yii/data/Sort.php
@@ -234,6 +234,9 @@ class Sort extends Object
 		return $orders;
 	}
 
+	/**
+	 * @var array the currently requested sort order as computed by [[getAttributeOrders]].
+	 */
 	private $_attributeOrders;
 
 	/**