diff --git a/timesheet/inc/class.botimesheet.inc.php b/timesheet/inc/class.botimesheet.inc.php
index 3468f644ef..8f50356c26 100644
--- a/timesheet/inc/class.botimesheet.inc.php
+++ b/timesheet/inc/class.botimesheet.inc.php
@@ -108,7 +108,7 @@ class botimesheet extends so_sql
 	 */
 	var $show_sums;
 
-	var $customfields;
+	var $customfields=array();
 
 	function botimesheet()
 	{