diff --git a/mysql/tables/llx_prelevement_facture.key.sql b/mysql/tables/llx_prelevement_facture.key.sql
new file mode 100644
index 00000000000..172aac33ebf
--- /dev/null
+++ b/mysql/tables/llx_prelevement_facture.key.sql
@@ -0,0 +1,29 @@
+-- ============================================================================
+-- Copyright (C) 2005 Rodolphe Quiedeville <rodolphe@quiedeville.org>
+--
+-- This program is free software; you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation; either version 2 of the License, or
+-- (at your option) any later version.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with this program; if not, write to the Free Software
+-- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+--
+-- $Id$
+-- $Source$
+--
+-- ============================================================================
+
+--
+--
+ALTER TABLE llx_prelevement_facture ADD INDEX (fk_prelevement_lignes);
+--
+--
+ALTER TABLE llx_prelevement_facture ADD FOREIGN KEY (fk_prelevement_lignes) REFERENCES llx_prelevement_lignes (rowid);
+
diff --git a/mysql/tables/llx_prelevement_lignes.key.sql b/mysql/tables/llx_prelevement_lignes.key.sql
new file mode 100644
index 00000000000..844bded981b
--- /dev/null
+++ b/mysql/tables/llx_prelevement_lignes.key.sql
@@ -0,0 +1,29 @@
+-- ============================================================================
+-- Copyright (C) 2005 Rodolphe Quiedeville <rodolphe@quiedeville.org>
+--
+-- This program is free software; you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation; either version 2 of the License, or
+-- (at your option) any later version.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with this program; if not, write to the Free Software
+-- Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+--
+-- $Id$
+-- $Source$
+--
+-- ============================================================================
+
+--
+--
+ALTER TABLE llx_prelevement_lignes ADD INDEX (fk_prelevement_bons);
+--
+--
+ALTER TABLE llx_prelevement_lignes ADD FOREIGN KEY (fk_prelevement_bons) REFERENCES llx_prelevement_bons (rowid);
+