diff --git a/system/core/Output.php b/system/core/Output.php
index ad87f85..ec9c21b 100644
--- a/system/core/Output.php
+++ b/system/core/Output.php
@@ -377,7 +377,7 @@
 	/**
 	 * Set Cache
 	 *
-	 * @param	int	$time	Cache expiration time in seconds
+	 * @param	int	$time	Cache expiration time in minutes
 	 * @return	CI_Output
 	 */
 	public function cache($time)