diff --git a/htdocs/product/stock/stocktransfer/class/stocktransfer.class.php b/htdocs/product/stock/stocktransfer/class/stocktransfer.class.php
index a144895e836..edc263f55b7 100644
--- a/htdocs/product/stock/stocktransfer/class/stocktransfer.class.php
+++ b/htdocs/product/stock/stocktransfer/class/stocktransfer.class.php
@@ -357,8 +357,8 @@ class StockTransfer extends CommonObject
 	/**
 	 * Used to sort lines by rank
 	 *
-	 * @param $a	1st element to test
-	 * @param $b	1st element to test
+	 * @param	Object	$a		1st element to test
+	 * @param	Object	$b		2nd element to test
 	 * @return int
 	 */
 	public function cmp($a, $b)