diff --git a/htdocs/install/mysql/tables/llx_accounting_account.sql b/htdocs/install/mysql/tables/llx_accounting_account.sql
index d74c1b75105..51346cc63f6 100644
--- a/htdocs/install/mysql/tables/llx_accounting_account.sql
+++ b/htdocs/install/mysql/tables/llx_accounting_account.sql
@@ -29,7 +29,7 @@ create table llx_accounting_account
   pcg_type        			varchar(20)  NOT NULL,
   pcg_subtype     			varchar(20)  NOT NULL,
   account_number  			varchar(32)  NOT NULL,
-  account_parent  			integer,							-- Hierarchic parent
+  account_parent  			integer DEFAULT 0,							-- Hierarchic parent
   label           			varchar(255) NOT NULL,
   fk_accounting_category 	integer DEFAULT 0,
   fk_user_author  			integer DEFAULT NULL,