Revert an unintended change from a027a7fd0d770cec0d71e888d8b6f4aa1568ce9f
diff --git a/system/libraries/Session/drivers/Session_redis_driver.php b/system/libraries/Session/drivers/Session_redis_driver.php
index cc242dd..e4e09fe 100644
--- a/system/libraries/Session/drivers/Session_redis_driver.php
+++ b/system/libraries/Session/drivers/Session_redis_driver.php
@@ -255,7 +255,7 @@
 				if ($this->_redis->ping() === '+PONG')
 				{
 					$this->_release_lock();
-					if ($this->_redis->close() === $this->_fail())
+					if ($this->_redis->close() === $this->_failure)
 					{
 						return $this->_fail();
 					}