diff --git a/htdocs/loan/class/loan.class.php b/htdocs/loan/class/loan.class.php
index c8e241186d2..f54375135a8 100644
--- a/htdocs/loan/class/loan.class.php
+++ b/htdocs/loan/class/loan.class.php
@@ -41,6 +41,9 @@ class Loan extends CommonObject
 	 */
 	public $table_element='loan';
 
+	/**
+	 * @var string String with name of icon for myobject. Must be the part after the 'object_' into object_myobject.png
+	 */
 	public $picto = 'bill';
 
 	/**