diff --git a/htdocs/product/fiche.php b/htdocs/product/fiche.php
index 5a92116d44e..dd0d00c433c 100644
--- a/htdocs/product/fiche.php
+++ b/htdocs/product/fiche.php
@@ -444,7 +444,7 @@ if ($_GET["action"] == 'create' && $user->rights->produit->creer)
       
       print '<table class="border" width="100%">';
       print '<tr>';
-      print '<td width="20%">'.$langs->trans("Ref").'</td><td><input name="ref" size="20" value="'.$product->ref.'">';
+      print '<td width="20%">'.$langs->trans("Ref").'</td><td><input name="ref" size="40" maxlength="32" value="'.$product->ref.'">';
       if ($_error == 1)
 	{
 	  print $langs->trans("RefAlreadyExists");
@@ -833,7 +833,7 @@ if ($_GET["id"] || $_GET["ref"])
 	  print '<input type="hidden" name="id" value="'.$product->id.'">';
 	  print '<input type="hidden" name="canvas" value="'.$product->canvas.'">';
 	  print '<table class="border" width="100%">';
-	  print '<tr><td width="15%">'.$langs->trans("Ref").'</td><td colspan="2"><input name="ref" size="20" value="'.$product->ref.'"></td></tr>';
+	  print '<tr><td width="15%">'.$langs->trans("Ref").'</td><td colspan="2"><input name="ref" size="40" maxlength="32" value="'.$product->ref.'"></td></tr>';
 	  print '<td>'.$langs->trans("Label").'</td><td><input name="libelle" size="40" value="'.$product->libelle.'"></td></tr>';
 
 	  print '<tr><td>'.$langs->trans("VATRate").'</td><td colspan="2">';
diff --git a/mysql/migration/2.1.0-2.2.0.sql b/mysql/migration/2.1.0-2.2.0.sql
index ef500ae0fee..a890f73564e 100644
--- a/mysql/migration/2.1.0-2.2.0.sql
+++ b/mysql/migration/2.1.0-2.2.0.sql
@@ -518,4 +518,6 @@ insert into `llx_menu_const` (`rowid`, `fk_menu`, `fk_constraint`, `user`) value
 insert into `llx_menu_const` (`rowid`, `fk_menu`, `fk_constraint`, `user`) values (109, 5001, 6, 2);
 
 ALTER TABLE llx_product ADD COLUMN volume float DEFAULT NULL after weight_units;
-ALTER TABLE llx_product ADD COLUMN volume_units tinyint DEFAULT NULL after volume;
\ No newline at end of file
+ALTER TABLE llx_product ADD COLUMN volume_units tinyint DEFAULT NULL after volume;
+
+ALTER TABLE llx_product modify ref varchar(32) NOT NULL;
\ No newline at end of file
diff --git a/mysql/tables/llx_product.sql b/mysql/tables/llx_product.sql
index 7a0c1b49811..870345fce14 100644
--- a/mysql/tables/llx_product.sql
+++ b/mysql/tables/llx_product.sql
@@ -25,7 +25,7 @@ create table llx_product
   rowid              integer AUTO_INCREMENT PRIMARY KEY,
   datec              datetime,
   tms                timestamp,
-  ref                varchar(16) NOT NULL,
+  ref                varchar(32) NOT NULL,
   label              varchar(255) NOT NULL,
   description        text,
   note               text,