diff --git a/htdocs/install/mysql/migration/3.0.0-3.1.0.sql b/htdocs/install/mysql/migration/3.0.0-3.1.0.sql
index 1591edfe391..7a8b75d08b5 100755
--- a/htdocs/install/mysql/migration/3.0.0-3.1.0.sql
+++ b/htdocs/install/mysql/migration/3.0.0-3.1.0.sql
@@ -484,3 +484,6 @@ ALTER TABLE llx_don ADD   phone_mobile    varchar(24) after email;
 ALTER TABLE llx_don ADD   phone           varchar(24) after email;
 
 ALTER TABLE llx_user ADD civilite varchar(6) after entity;
+
+ALTER TABLE llx_element_element MODIFY sourcetype varchar(32) NOT NULL;
+ALTER TABLE llx_element_element MODIFY targettype varchar(32) NOT NULL;
\ No newline at end of file
diff --git a/htdocs/install/mysql/tables/llx_element_element.sql b/htdocs/install/mysql/tables/llx_element_element.sql
index 57d92bc8ce9..60d02146b9d 100644
--- a/htdocs/install/mysql/tables/llx_element_element.sql
+++ b/htdocs/install/mysql/tables/llx_element_element.sql
@@ -1,5 +1,6 @@
 -- ============================================================================
--- Copyright (C) 2008 Laurent Destailleur  <eldy@users.sourceforge.net>
+-- Copyright (C) 2008-2011	Laurent Destailleur	<eldy@users.sourceforge.net>
+-- Copyright (C) 2011		Regis Houssin		<regis@dolibarr.fr>
 --
 -- This program is free software; you can redistribute it and/or modify
 -- it under the terms of the GNU General Public License as published by
@@ -24,8 +25,8 @@ create table llx_element_element
 (
   rowid           	integer AUTO_INCREMENT PRIMARY KEY,  
   fk_source			integer NOT NULL,
-  sourcetype		varchar(16) NOT NULL,
+  sourcetype		varchar(32) NOT NULL,
   fk_target			integer NOT NULL,
-  targettype		varchar(16) NOT NULL
+  targettype		varchar(32) NOT NULL
 ) ENGINE=innodb;