diff --git a/htdocs/install/mysql/migration/15.0.0-16.0.0.sql b/htdocs/install/mysql/migration/15.0.0-16.0.0.sql
index 9a903fdf4eb..d0aac914cb9 100644
--- a/htdocs/install/mysql/migration/15.0.0-16.0.0.sql
+++ b/htdocs/install/mysql/migration/15.0.0-16.0.0.sql
@@ -94,3 +94,5 @@ CREATE TABLE llx_stock_mouvement_extrafields (
     fk_object integer NOT NULL,
     import_key varchar(14)
 )ENGINE=innodb;
+
+ALTER TABLE llx_mrp_mo ADD COLUMN fk_parent_line integer;
diff --git a/htdocs/install/mysql/tables/llx_mrp_mo.sql b/htdocs/install/mysql/tables/llx_mrp_mo.sql
index 88dc5d42789..14cfdf36c1e 100644
--- a/htdocs/install/mysql/tables/llx_mrp_mo.sql
+++ b/htdocs/install/mysql/tables/llx_mrp_mo.sql
@@ -40,6 +40,7 @@ CREATE TABLE llx_mrp_mo(
 	date_end_planned datetime, 
 	fk_bom integer, 
 	fk_project integer,
-	last_main_doc varchar(255)
-	-- END MODULEBUILDER FIELDS
+	last_main_doc varchar(255),
+    fk_parent_line integer
+    -- END MODULEBUILDER FIELDS
 ) ENGINE=innodb;