diff --git a/htdocs/install/mysql/tables/llx_element_resources.sql b/htdocs/install/mysql/tables/llx_element_resources.sql
index 9c67a0d52af..4fac28de4b1 100644
--- a/htdocs/install/mysql/tables/llx_element_resources.sql
+++ b/htdocs/install/mysql/tables/llx_element_resources.sql
@@ -26,6 +26,10 @@ CREATE TABLE llx_element_resources
   resource_type	  varchar(64),		-- resource or user
   busy			  integer,
   mandatory		  integer,
+  dateo				date,						    -- date start of using ressource
+  datee				date,						    -- date end of using ressource
+  datet				date,						    -- date terminaison of using ressource
+  duree				real,               -- total duration of using ressource
   fk_user_create  integer,
   tms             timestamp
 )ENGINE=innodb;