diff --git a/mysql/migration/2.0.0-2.1.0.sql b/mysql/migration/2.0.0-2.1.0.sql
index 5b463d90316..d1bc67f7b9d 100644
--- a/mysql/migration/2.0.0-2.1.0.sql
+++ b/mysql/migration/2.0.0-2.1.0.sql
@@ -61,7 +61,7 @@ UPDATE llx_societe set parent = null where parent = 0;
 
 alter table llx_product add gencode varchar(255) DEFAULT NULL;
 alter table llx_product add weight real DEFAULT NULL;
-alter table llx_product add weight_units tinyint(1) DEFAULT 0;
+alter table llx_product add weight_units tinyint DEFAULT NULL;
 alter table llx_product add canvas varchar(15) DEFAULT '';
 
 insert into llx_cond_reglement(rowid, code, sortorder, active, libelle, libelle_facture, fdm, nbjour) values (6,'PROFORMA',    6,1, 'Proforma','Réglement avant livraison',0,0);
diff --git a/mysql/tables/llx_product.sql b/mysql/tables/llx_product.sql
index 0901674891e..7031825d388 100644
--- a/mysql/tables/llx_product.sql
+++ b/mysql/tables/llx_product.sql
@@ -40,8 +40,8 @@ create table llx_product
   stock_commande     integer DEFAULT 0,
   seuil_stock_alerte integer DEFAULT 0,
   gencode            varchar(255) DEFAULT NULL,
-  weight             float DEFAULT 0,
-  weight_units       tinyint(1) DEFAULT 0,
+  weight             real DEFAULT NULL,
+  weight_units       tinyint DEFAULT NULL,
   canvas             varchar(15) DEFAULT ''
 )type=innodb;