diff --git a/system/libraries/Cache/drivers/Cache_apc.php b/system/libraries/Cache/drivers/Cache_apc.php
index 07ea8f4..fb8df03 100644
--- a/system/libraries/Cache/drivers/Cache_apc.php
+++ b/system/libraries/Cache/drivers/Cache_apc.php
@@ -97,7 +97,7 @@
 	 *
 	 * @param	string	$id	Cache ID
 	 * @param	mixed	$data	Data to store
-	 * @param	int	$ttol	Length of time (in seconds) to cache the data
+	 * @param	int	$ttl	Length of time (in seconds) to cache the data
 	 * @param	bool	$raw	Whether to store the raw value
 	 * @return	bool	TRUE on success, FALSE on failure
 	 */