fix #5545
diff --git a/system/libraries/Session/drivers/Session_redis_driver.php b/system/libraries/Session/drivers/Session_redis_driver.php
index d7a5755..f351aff 100644
--- a/system/libraries/Session/drivers/Session_redis_driver.php
+++ b/system/libraries/Session/drivers/Session_redis_driver.php
@@ -323,7 +323,7 @@
 	 * @param	string	$id
 	 * @return	bool
 	 */
-	public function validateId($id)
+	public function validateSessionId($id)
 	{
 		return (bool) $this->_redis->exists($this->_key_prefix.$id);
 	}