diff --git a/system/database/drivers/postgre/postgre_forge.php b/system/database/drivers/postgre/postgre_forge.php
index d86fb96..8b214eb 100644
--- a/system/database/drivers/postgre/postgre_forge.php
+++ b/system/database/drivers/postgre/postgre_forge.php
@@ -156,7 +156,7 @@
 	 * @param	bool	should 'IF NOT EXISTS' be added to the SQL
 	 * @return	bool
 	 */
-	public function _create_table($table, $fields, $primary_keys, $keys, $if_not_exists)
+	protected function _create_table($table, $fields, $primary_keys, $keys, $if_not_exists)
 	{
 		$sql = 'CREATE TABLE ';
 
@@ -224,7 +224,7 @@
 	 * @param	string	the field after which we should add the new field
 	 * @return	string
 	 */
-	public function _alter_table($alter_type, $table, $fields, $after_field = '')
+	protected function _alter_table($alter_type, $table, $fields, $after_field = '')
  	{
  		$sql = 'ALTER TABLE '.$this->db->protect_identifiers($table).' '.$alter_type.' ';