diff --git a/core/abstract/abstract_util.php b/core/abstract/abstract_util.php
index cec9a48..e624660 100644
--- a/core/abstract/abstract_util.php
+++ b/core/abstract/abstract_util.php
@@ -20,6 +20,8 @@ namespace Query\Driver;
  *
  * @package Query
  * @subpackage Drivers
+ * @method string quote_ident(string $sql)
+ * @method string quote_table(string $sql)
  */
 abstract class Abstract_Util {
 
@@ -62,11 +64,10 @@ abstract class Abstract_Util {
 	 * @param string $name
 	 * @param array $fields
 	 * @param array $constraints
-	 * @param array $indexes
 	 *
 	 * @return string
 	 */
-	public function create_table($name, $fields, array $constraints=array(), array $indexes=array())
+	public function create_table($name, $fields, array $constraints=array())
 	{
 		$column_array = array();
 
diff --git a/drivers/firebird/firebird_util.php b/drivers/firebird/firebird_util.php
index cf35993..00001e7 100644
--- a/drivers/firebird/firebird_util.php
+++ b/drivers/firebird/firebird_util.php
@@ -23,6 +23,7 @@ namespace Query\Driver;
  * @method array get_system_tables()
  * @method array get_tables()
  * @method object query(string $sql)
+ * @method resource get_service()
  */
 class Firebird_Util extends Abstract_Util {
 
@@ -94,7 +95,7 @@ class Firebird_Util extends Abstract_Util {
 	public function backup_structure()
 	{
 		list($db_path, $new_file) = func_get_args();
-		return ibase_backup($this->get_service(), $db_path, $new_file, IBASE_BKP_METADATA_ONLY);
+		return ibase_backup($this->get_service(), $db_path, $new_file, \IBASE_BKP_METADATA_ONLY);
 	}
 
 	// --------------------------------------------------------------------------