diff --git a/htdocs/core/class/commoninvoice.class.php b/htdocs/core/class/commoninvoice.class.php
index bbe78e764bc..449fcdfa7d7 100644
--- a/htdocs/core/class/commoninvoice.class.php
+++ b/htdocs/core/class/commoninvoice.class.php
@@ -1997,7 +1997,13 @@ abstract class CommonInvoiceLine extends CommonObjectLine
 
 	public $special_code = 0;
 
+	/**
+	 * @deprecated	Use user_creation_id
+	 */
 	public $fk_user_author;
+	/**
+	 * @deprecated	Use user_modification_id
+	 */
 	public $fk_user_modif;
 
 	public $fk_accounting_account;