diff --git a/htdocs/install/mysql/migration/6.0.0-7.0.0.sql b/htdocs/install/mysql/migration/6.0.0-7.0.0.sql
index 8900a07104a..0f32f1c731b 100644
--- a/htdocs/install/mysql/migration/6.0.0-7.0.0.sql
+++ b/htdocs/install/mysql/migration/6.0.0-7.0.0.sql
@@ -41,6 +41,9 @@ ALTER TABLE llx_website_page ADD COLUMN fk_user_modif integer;
 
 -- For 7.0
 
+ALTER TABLE llx_product MODIFY COLUMN seuil_stock_alerte integer DEFAULT NULL;
+-- VPGSQL8.2 ALTER TABLE llx_product ALTER COLUMN seuil_stock_alerte SET DEFAULT NULL;
+
 ALTER TABLE llx_facture_rec ADD COLUMN suspended integer DEFAULT 0;
 
 ALTER TABLE llx_facture_rec MODIFY COLUMN titre VARCHAR(100);
diff --git a/htdocs/install/mysql/tables/llx_product.sql b/htdocs/install/mysql/tables/llx_product.sql
index 1769ec6bd3e..04267d22d3a 100755
--- a/htdocs/install/mysql/tables/llx_product.sql
+++ b/htdocs/install/mysql/tables/llx_product.sql
@@ -60,7 +60,7 @@ create table llx_product
   tobatch					tinyint      DEFAULT 0 NOT NULL,  -- Is it a product that need a batch management (eat-by or lot management)
   fk_product_type			integer      DEFAULT 0,			-- Type of product: 0 for regular product, 1 for service, 9 for other (used by external module)
   duration					varchar(6),
-  seuil_stock_alerte		integer      DEFAULT 0,
+  seuil_stock_alerte		integer      DEFAULT NULL,
   url						varchar(255),
   barcode					varchar(255) DEFAULT NULL,		-- barcode
   fk_barcode_type			integer      DEFAULT NULL,		-- barcode type
diff --git a/htdocs/langs/en_US/stocks.lang b/htdocs/langs/en_US/stocks.lang
index f2115666a36..9525b43432d 100644
--- a/htdocs/langs/en_US/stocks.lang
+++ b/htdocs/langs/en_US/stocks.lang
@@ -71,7 +71,7 @@ NoPredefinedProductToDispatch=No predefined products for this object. So no disp
 DispatchVerb=Dispatch
 StockLimitShort=Limit for alert
 StockLimit=Stock limit for alert
-StockLimitDesc="" (empty) default value means no alert. <br>"0" can be used with 'Stock can be negative' configuration.
+StockLimitDesc=(empty) means no warning.<br>0 can be used for a warning as soon as stock is empty.
 PhysicalStock=Physical stock
 RealStock=Real Stock
 RealStockDesc=Physical or real stock is the stock you currently have into your internal warehouses/emplacements.