diff --git a/htdocs/install/mysql/migration/15.0.0-16.0.0.sql b/htdocs/install/mysql/migration/15.0.0-16.0.0.sql
index c76abb14eb1..addba742afb 100644
--- a/htdocs/install/mysql/migration/15.0.0-16.0.0.sql
+++ b/htdocs/install/mysql/migration/15.0.0-16.0.0.sql
@@ -223,3 +223,8 @@ ALTER TABLE llx_facture_fourn_det_rec_extrafields ADD INDEX idx_facture_fourn_de
 ALTER TABLE llx_facture_fourn ADD COLUMN fk_fac_rec_source integer;
 
 ALTER TABLE llx_mrp_mo ADD COLUMN fk_parent_line integer;
+
+ALTER TABLE llx_product_attribute_value MODIFY COLUMN ref VARCHAR(180) NOT NULL;
+ALTER TABLE llx_product_attribute_value MODIFY COLUMN value VARCHAR(255) NOT NULL;
+ALTER TABLE llx_product_attribute_value ADD COLUMN position INTEGER NOT NULL DEFAULT 0;
+ALTER TABLE llx_product_attribute CHANGE rang position INTEGER DEFAULT 0 NOT NULL;
diff --git a/htdocs/install/mysql/tables/llx_product_attribute.sql b/htdocs/install/mysql/tables/llx_product_attribute.sql
index 362c104b95c..e4e60719046 100644
--- a/htdocs/install/mysql/tables/llx_product_attribute.sql
+++ b/htdocs/install/mysql/tables/llx_product_attribute.sql
@@ -21,10 +21,10 @@
 
 CREATE TABLE llx_product_attribute
 (
-  rowid INT PRIMARY KEY NOT NULL AUTO_INCREMENT,
-  ref VARCHAR(255) NOT NULL,
-  ref_ext VARCHAR(255) NULL,
-  label VARCHAR(255) NOT NULL,
-  rang INT DEFAULT 0 NOT NULL,
-  entity INT DEFAULT 1 NOT NULL
+  rowid		INTEGER			PRIMARY KEY NOT NULL AUTO_INCREMENT,
+  ref		VARCHAR(255)	NOT NULL,
+  ref_ext	VARCHAR(255)	NULL,
+  label		VARCHAR(255)	NOT NULL,
+  position	INTEGER			DEFAULT 0 NOT NULL,
+  entity	INTEGER			DEFAULT 1 NOT NULL
 )ENGINE=innodb;
diff --git a/htdocs/install/mysql/tables/llx_product_attribute_value.sql b/htdocs/install/mysql/tables/llx_product_attribute_value.sql
index 09e7d325d0d..e6821976ed2 100644
--- a/htdocs/install/mysql/tables/llx_product_attribute_value.sql
+++ b/htdocs/install/mysql/tables/llx_product_attribute_value.sql
@@ -21,9 +21,10 @@
 
 CREATE TABLE llx_product_attribute_value
 (
-  rowid INT PRIMARY KEY NOT NULL AUTO_INCREMENT,
-  fk_product_attribute INT NOT NULL,
-  ref VARCHAR(180) DEFAULT NULL,
-  value VARCHAR(255) DEFAULT NULL,
-  entity INT DEFAULT 1 NOT NULL
+  rowid					INTEGER			PRIMARY KEY NOT NULL AUTO_INCREMENT,
+  fk_product_attribute	INTEGER			NOT NULL,
+  ref					VARCHAR(180)	NOT NULL,
+  value					VARCHAR(255)	NOT NULL,
+  entity				INTEGER			DEFAULT 1 NOT NULL,
+  position				INTEGER			NOT NULL DEFAULT 0
 )ENGINE=innodb;