diff --git a/mysql/foreign_keys.sql b/mysql/foreign_keys.sql
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index 00000000000..4399d16d84e
--- /dev/null
+++ b/mysql/foreign_keys.sql
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+-- ============================================================================
+-- Copyright (C) 2003 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_facturedet  ADD INDEX (fk_facture);
+
+ALTER TABLE llx_propal      ADD INDEX (fk_soc);
+
+ALTER TABLE llx_propal      ADD FOREIGN KEY (fk_soc) REFERENCES llx_societe (idp);
+
+ALTER TABLE llx_facture     ADD FOREIGN KEY (fk_soc) REFERENCES llx_societe (idp);
+
+ALTER TABLE llx_facturedet  ADD FOREIGN KEY (fk_facture) REFERENCES llx_facture (rowid);
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