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 e228cf2296e..d3b4fde1e03 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
@@ -117,6 +117,10 @@ ALTER TABLE llx_usergroup_user ADD CONSTRAINT fk_usergroup_user_fk_usergroup FOR
 ALTER TABLE llx_commande ADD COLUMN ref_int	varchar(30) AFTER ref_ext;
 ALTER TABLE llx_facture ADD COLUMN ref_int varchar(30) AFTER ref_ext;
 ALTER TABLE llx_societe ADD COLUMN ref_int varchar(60) AFTER ref_ext;
+ALTER TABLE llx_expedition ADD COLUMN ref_ext varchar(30) AFTER fk_soc;
+ALTER TABLE llx_expedition ADD COLUMN ref_int varchar(30) AFTER ref_ext;
+ALTER TABLE llx_livraison ADD COLUMN ref_ext varchar(30) AFTER fk_soc;
+ALTER TABLE llx_livraison ADD COLUMN ref_int varchar(30) AFTER ref_ext;
 
 --Add Chile data (id pays=67)
 -- Regions Chile
diff --git a/htdocs/install/mysql/tables/llx_expedition.sql b/htdocs/install/mysql/tables/llx_expedition.sql
index 70d67c96dbe..f289b9cb514 100644
--- a/htdocs/install/mysql/tables/llx_expedition.sql
+++ b/htdocs/install/mysql/tables/llx_expedition.sql
@@ -25,9 +25,12 @@ create table llx_expedition
   tms                   timestamp,
   ref                   varchar(30)        NOT NULL,
   entity                integer  DEFAULT 1 NOT NULL,	-- multi company id
-  ref_customer          varchar(30),					-- customer number
   fk_soc                integer            NOT NULL,
   
+  ref_ext               varchar(30),					-- reference into an external system (not used by dolibarr)
+  ref_int				varchar(30),					-- reference into an internal system (used by dolibarr)
+  ref_customer          varchar(30),					-- customer number
+  
   date_creation         datetime,						-- date de creation
   fk_user_author        integer,						-- createur
   date_valid            datetime,						-- date de validation
diff --git a/htdocs/install/mysql/tables/llx_livraison.sql b/htdocs/install/mysql/tables/llx_livraison.sql
index b446a53a959..e0b2c2494ad 100644
--- a/htdocs/install/mysql/tables/llx_livraison.sql
+++ b/htdocs/install/mysql/tables/llx_livraison.sql
@@ -25,9 +25,12 @@ create table llx_livraison
   tms                   timestamp,
   ref                   varchar(30)  NOT NULL,			-- delivery number
   entity                integer DEFAULT 1 NOT NULL,		-- multi company id
-  ref_customer          varchar(30),					-- customer number
   fk_soc                integer      NOT NULL,
   
+  ref_ext               varchar(30),					-- reference into an external system (not used by dolibarr)
+  ref_int				varchar(30),					-- reference into an internal system (used by dolibarr)
+  ref_customer          varchar(30),					-- customer number
+  
   date_creation         datetime,						-- date de creation
   fk_user_author        integer,						-- createur du bon de livraison
   date_valid            datetime,						-- date de validation