diff --git a/system/libraries/Session/Session.php b/system/libraries/Session/Session.php
index a5c9737..be9f5e3 100644
--- a/system/libraries/Session/Session.php
+++ b/system/libraries/Session/Session.php
@@ -567,7 +567,7 @@
 		{
 			foreach ($key as $k)
 			{
-				unset($_SESSION[$key]);
+				unset($_SESSION[$k]);
 			}
 
 			return;
diff --git a/system/libraries/Session/drivers/Session_database_driver.php b/system/libraries/Session/drivers/Session_database_driver.php
index 032199f..563d1fd 100644
--- a/system/libraries/Session/drivers/Session_database_driver.php
+++ b/system/libraries/Session/drivers/Session_database_driver.php
@@ -116,7 +116,7 @@
 
 	public function read($session_id)
 	{
-		if ($this->_get_lock() !== FALSE)
+		if ($this->_get_lock($session_id) !== FALSE)
 		{
 			$this->_db
 				->select('data')