diff --git a/htdocs/accountancy/class/bookkeeping.class.php b/htdocs/accountancy/class/bookkeeping.class.php
index 6291790d008..9d0de035223 100644
--- a/htdocs/accountancy/class/bookkeeping.class.php
+++ b/htdocs/accountancy/class/bookkeeping.class.php
@@ -27,7 +27,7 @@
 /**
  *	Class to manage accountancy book keeping
  */
-class BookKeeping
+class BookKeeping extends CommonObject
 {
 	var $db;
 	var $error;