diff --git a/htdocs/install/mysql/migration/3.9.0-4.0.0.sql b/htdocs/install/mysql/migration/3.9.0-4.0.0.sql
index 2b38f915869d1a195ded827be1966b1246c25f5b..8268d0a0773adb5b397fd69931a32ab9814c51cd 100644
--- a/htdocs/install/mysql/migration/3.9.0-4.0.0.sql
+++ b/htdocs/install/mysql/migration/3.9.0-4.0.0.sql
@@ -21,7 +21,7 @@
 -- -- VPGSQL8.2 DELETE FROM llx_usergroup_user      WHERE fk_user      NOT IN (SELECT rowid from llx_user);
 -- -- VMYSQL4.1 DELETE FROM llx_usergroup_user      WHERE fk_usergroup NOT IN (SELECT rowid from llx_usergroup);
 
-
+ALTER TABLE llx_product ADD COLUMN  model_pdf	varchar(255) default '';
 
 CREATE TABLE llx_categorie_user 
 (
diff --git a/htdocs/install/mysql/tables/llx_product.sql b/htdocs/install/mysql/tables/llx_product.sql
index 1f7b7da3c0deca212bef23dba098791ee9787302..e2ed0a496274606823139fe71f7ff31aeee7e36b 100755
--- a/htdocs/install/mysql/tables/llx_product.sql
+++ b/htdocs/install/mysql/tables/llx_product.sql
@@ -81,6 +81,7 @@ create table llx_product
   finished					tinyint      DEFAULT NULL,		-- 1=manufactured product, 0=matiere premiere
   hidden					tinyint      DEFAULT 0,			-- Not used. Deprecated.
   import_key				varchar(14),					-- Import key
+  model_pdf				varchar(255),           -- model save dodument used
   fk_price_expression integer,                     -- Link to the rule for dynamic price calculation
   desiredstock              integer      DEFAULT 0,
   fk_unit					integer      DEFAULT NULL,