diff --git a/system/libraries/Cache/drivers/Cache_memcached.php b/system/libraries/Cache/drivers/Cache_memcached.php
index 8bb4a56..56ab5b8 100644
--- a/system/libraries/Cache/drivers/Cache_memcached.php
+++ b/system/libraries/Cache/drivers/Cache_memcached.php
@@ -187,7 +187,7 @@
 	/**
 	 * Delete from Cache
 	 *
-	 * @param	mixed	key to be deleted.
+	 * @param	mixed	$id	key to be deleted.
 	 * @return	bool	true on success, false on failure
 	 */
 	public function delete($id)
@@ -252,7 +252,7 @@
 	/**
 	 * Get Cache Metadata
 	 *
-	 * @param	mixed	key to get cache metadata on
+	 * @param	mixed	$id	key to get cache metadata on
 	 * @return	mixed	FALSE on failure, array on success.
 	 */
 	public function get_metadata($id)