diff --git a/htdocs/core/class/commondocgenerator.class.php b/htdocs/core/class/commondocgenerator.class.php
index 03a5154f23f..2340657ef4e 100644
--- a/htdocs/core/class/commondocgenerator.class.php
+++ b/htdocs/core/class/commondocgenerator.class.php
@@ -55,6 +55,11 @@ abstract class CommonDocGenerator
 	 */
 	public $extrafieldsCache;
 
+	/**
+	 * @var int	If set to 1, save the fullname of generated file with path as the main doc when generating a doc with this template.
+	 */
+	public $update_main_doc_field;
+
 	/**
 	 *	Constructor
 	 *