diff --git a/htdocs/install/mysql/migration/3.7.0-3.8.0.sql b/htdocs/install/mysql/migration/3.7.0-3.8.0.sql
index 73e7694c040..ea80e18b213 100755
--- a/htdocs/install/mysql/migration/3.7.0-3.8.0.sql
+++ b/htdocs/install/mysql/migration/3.7.0-3.8.0.sql
@@ -19,6 +19,10 @@
 -- -- VMYSQL4.1 DELETE FROM llx_usergroup_user      WHERE fk_usergroup NOT IN (SELECT rowid from llx_usergroup);
 
 
+UPDATE TABLE llx_facture_fourn set ref=id where ref IS NULL;
+ALTER TABLE llx_facture_fourn MODIFY COLUMN ref varchar(255) NOT NULL;
+
+
 -- IVORY COST (id country=21)
 insert into llx_c_tva(rowid,fk_pays,taux,recuperableonly,localtax1,localtax1_type,localtax2,localtax2_type,note,active) values (211, 21,  '0','0',0,0,0,0,'IVA Rate 0',1);
 insert into llx_c_tva(rowid,fk_pays,taux,recuperableonly,localtax1,localtax1_type,localtax2,localtax2_type,note,active) values (212, 21,  '18','0',7.5,2,0,0,'IVA standard rate',1);
diff --git a/htdocs/install/mysql/tables/llx_facture_fourn.sql b/htdocs/install/mysql/tables/llx_facture_fourn.sql
index 703b86841f9..1e7fa12d565 100644
--- a/htdocs/install/mysql/tables/llx_facture_fourn.sql
+++ b/htdocs/install/mysql/tables/llx_facture_fourn.sql
@@ -22,7 +22,7 @@
 create table llx_facture_fourn
 (
   rowid					integer AUTO_INCREMENT PRIMARY KEY,
-  ref					varchar(255),
+  ref					varchar(255) NOT NULL,
   ref_supplier			varchar(255) NOT NULL,
   entity				integer  DEFAULT 1 NOT NULL,	 -- multi company id