diff --git a/htdocs/resource/class/dolresource.class.php b/htdocs/resource/class/dolresource.class.php
index c85f040f896..db64c635fd5 100644
--- a/htdocs/resource/class/dolresource.class.php
+++ b/htdocs/resource/class/dolresource.class.php
@@ -39,7 +39,10 @@ class Dolresource extends CommonObject
 	 */
 	public $table_element='resource';
 
-    public $picto = 'resource';
+	/**
+	 * @var string String with name of icon for myobject. Must be the part after the 'object_' into object_myobject.png
+	 */
+	public $picto = 'resource';
 
 	public $resource_id;
 	public $resource_type;