diff --git a/htdocs/install/mysql/migration/3.3.0-3.4.0.sql b/htdocs/install/mysql/migration/3.3.0-3.4.0.sql
index 18e984858ed..f2a48bed29c 100755
--- a/htdocs/install/mysql/migration/3.3.0-3.4.0.sql
+++ b/htdocs/install/mysql/migration/3.3.0-3.4.0.sql
@@ -11,6 +11,8 @@
 -- To drop a foreign key:   ALTER TABLE llx_table DROP FOREIGN KEY fk_name;
 -- To restrict request to Mysql version x.y use -- VMYSQLx.y
 -- To restrict request to Pgsql version x.y use -- VPGSQLx.y
+-- To make a primary key (mysql):   VMYSQL4.3 ALTER TABLE llx_table CHANGE COLUMN rowid INTEGER AUTO_INCREMENT PRIMARY_KEY;
+-- To make a primary key (postgres) VPGSQL8.2 ALTER TABLE llx_table CHANGE COLUMN rowid INTEGER SERIAL PRIMARY KEY;
 
 
 -- -- VPGSQL8.2 DELETE FROM llx_usergroup_user      WHERE fk_user      NOT IN (SELECT rowid from llx_user);
@@ -78,5 +80,7 @@ alter table llx_societe_rib CHANGE COLUMN adresse_proprio owner_address text;
 alter table llx_societe_address CHANGE COLUMN ville town text;
 alter table llx_societe_address CHANGE COLUMN cp zip varchar(10);
 
-ALTER TABLE llx_c_shipment_mode ADD COLUMN tracking VARCHAR(256) NOT NULL AFTER description;
-ALTER TABLE llx_c_shipment_mode MODIFY COLUMN rowid INT(11) NOT NULL AUTO_INCREMENT;
+ALTER TABLE llx_c_shipment_mode ADD COLUMN tracking VARCHAR(256) NOT NULL DEFAULT '' AFTER description;
+ALTER TABLE llx_c_shipment_mode CHANGE COLUMN rowid INTEGER NOT NULL;
+-- VMYSQL4.3 ALTER TABLE llx_c_shipment_mode CHANGE COLUMN rowid INTEGER AUTO_INCREMENT PRIMARY_KEY;
+-- VPGSQL8.2 ALTER TABLE llx_c_shipment_mode CHANGE COLUMN rowid INTEGER SERIAL PRIMARY KEY;