diff --git a/htdocs/install/mysql/migration/13.0.0-14.0.0.sql b/htdocs/install/mysql/migration/13.0.0-14.0.0.sql
index a969cbc0564..287a568c646 100644
--- a/htdocs/install/mysql/migration/13.0.0-14.0.0.sql
+++ b/htdocs/install/mysql/migration/13.0.0-14.0.0.sql
@@ -33,6 +33,8 @@
 ALTER TABLE llx_supplier_proposal_extrafields ADD INDEX idx_supplier_proposal_extrafields (fk_object);
 ALTER TABLE llx_supplier_proposaldet_extrafields ADD INDEX idx_supplier_proposaldet_extrafields (fk_object);
 
+ALTER TABLE llx_asset_extrafields ADD INDEX idx_asset_extrafields (fk_object);
+
 -- For v14
 
 ALTER TABLE llx_c_availability ADD COLUMN position integer NOT NULL DEFAULT 0;
diff --git a/htdocs/install/mysql/tables/llx_asset_extrafields.key.sql b/htdocs/install/mysql/tables/llx_asset_extrafields.key.sql
new file mode 100644
index 00000000000..fe6bb053ed6
--- /dev/null
+++ b/htdocs/install/mysql/tables/llx_asset_extrafields.key.sql
@@ -0,0 +1,20 @@
+-- ===================================================================
+-- Copyright (C) 2021      Frédéric France  <frederic.france@netlogic.fr>
+--
+-- 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 3 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, see <https://www.gnu.org/licenses/>.
+--
+-- ===================================================================
+
+
+ALTER TABLE llx_asset_extrafields ADD INDEX idx_asset_extrafields (fk_object);