PDO patch and run the test
diff --git a/.travis.yml b/.travis.yml
index 97ea042..38fa716 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -25,4 +25,5 @@
 branches:
   only:
     - develop
-    - master
\ No newline at end of file
+    - master
+    - pdo-patch
\ No newline at end of file
diff --git a/system/database/drivers/pdo/pdo_driver.php b/system/database/drivers/pdo/pdo_driver.php
index 60151b9..d7d4db3 100644
--- a/system/database/drivers/pdo/pdo_driver.php
+++ b/system/database/drivers/pdo/pdo_driver.php
@@ -225,7 +225,7 @@
 		 *
 		 * Reference: http://www.php.net/manual/en/ref.pdo-mysql.connection.php
 		 */
-		if ($this->subdriver === 'mysql' && ! is_php('5.3.6') && ! empty($this->char_set))
+		if ($this->pdodriver === 'mysql' && ! is_php('5.3.6') && ! empty($this->char_set))
 		{
 			$this->options[PDO::MYSQL_ATTR_INIT_COMMAND] = 'SET NAMES '.$this->char_set
 					.( ! empty($this->db_collat) ? " COLLATE '".$this->dbcollat."'" : '');