diff --git a/htdocs/install/mysql/tables/llx_product.sql b/htdocs/install/mysql/tables/llx_product.sql
index b665dc911fa..fb6e4cf5f1a 100755
--- a/htdocs/install/mysql/tables/llx_product.sql
+++ b/htdocs/install/mysql/tables/llx_product.sql
@@ -95,5 +95,5 @@ create table llx_product
   desiredstock                  integer      DEFAULT 0,
   fk_unit                       integer      DEFAULT NULL,
   price_autogen                 tinyint      DEFAULT 0,
-  fk_project                    integer      DEFAULT NULL
+  fk_project                    integer      DEFAULT NULL           -- Used when product was generated by a project or is specifif to a project
 )ENGINE=innodb;