diff --git a/htdocs/install/mysql/migration/9.0.0-10.0.0.sql b/htdocs/install/mysql/migration/9.0.0-10.0.0.sql
index c1ba9fbe81f..28312f64f18 100644
--- a/htdocs/install/mysql/migration/9.0.0-10.0.0.sql
+++ b/htdocs/install/mysql/migration/9.0.0-10.0.0.sql
@@ -242,5 +242,5 @@ ALTER TABLE llx_facturedet_rec ADD COLUMN fk_user_modif integer;
 ALTER TABLE llx_expensereport_det MODIFY COLUMN value_unit double(24,8) NOT NULL;
 ALTER TABLE llx_expensereport_det ADD COLUMN subprice double(24,8) DEFAULT 0 NOT NULL after qty;
 
-ALTER TABLE `llx_product_attribute_combination` ADD INDEX(` fk_product_parent `);
-ALTER TABLE `llx_product_attribute_combination` ADD INDEX(` fk_product_child `);
+ALTER TABLE llx_product_attribute_combination ADD INDEX( fk_product_parent );
+ALTER TABLE llx_product_attribute_combination ADD INDEX( fk_product_child );