diff --git a/src/app/code/community/Fontis/Australia/sql/australia_setup/mysql4-upgrade-2.2.1-2.2.2.php b/src/app/code/community/Fontis/Australia/sql/australia_setup/mysql4-upgrade-2.2.1-2.2.2.php
index <HASH>..<HASH> 100644
--- a/src/app/code/community/Fontis/Australia/sql/australia_setup/mysql4-upgrade-2.2.1-2.2.2.php
+++ b/src/app/code/community/Fontis/Australia/sql/australia_setup/mysql4-upgrade-2.2.1-2.2.2.php
@@ -20,7 +20,7 @@ $installer = $this;
 $installer->startSetup();
 
 $installer->run(
-    "ALTER TABLE `australia_eparcel`"
+    "ALTER TABLE {$this->getTable('australia_eparcel')}"
     . " ADD `charge_code_individual` VARCHAR( 50 ) NULL DEFAULT NULL,"
     . " ADD `charge_code_business` VARCHAR( 50 ) NULL DEFAULT NULL"
 );
Allowing extension to run on prefixed database tables.