diff --git a/htdocs/install/mysql/migration/3.2.0-3.3.0.sql b/htdocs/install/mysql/migration/3.2.0-3.3.0.sql
index 7c594ef77af..07e1d00be10 100755
--- a/htdocs/install/mysql/migration/3.2.0-3.3.0.sql
+++ b/htdocs/install/mysql/migration/3.2.0-3.3.0.sql
@@ -300,7 +300,7 @@ create table llx_accounting_system
   active            smallint        DEFAULT 0
 )ENGINE=innodb;
 
-ALTER TABLE llx_accounting_system ADD UNIQUE INDEX idx_accounting_system_pcg_version (pcg_version);
+ALTER TABLE llx_accounting_system ADD UNIQUE INDEX uk_accounting_system_pcg_version (pcg_version);
 
 create table llx_accountingaccount
 (
diff --git a/htdocs/install/mysql/tables/llx_accounting_system.key.sql b/htdocs/install/mysql/tables/llx_accounting_system.key.sql
index 7b84fd5d6b6..9cf22dadc4f 100644
--- a/htdocs/install/mysql/tables/llx_accounting_system.key.sql
+++ b/htdocs/install/mysql/tables/llx_accounting_system.key.sql
@@ -18,5 +18,5 @@
 -- ===========================================================================
 
 
-ALTER TABLE llx_accounting_system ADD UNIQUE INDEX idx_accounting_system_pcg_version (pcg_version);
+ALTER TABLE llx_accounting_system ADD UNIQUE INDEX uk_accounting_system_pcg_version (pcg_version);