diff --git a/system/core/Output.php b/system/core/Output.php
index 5173f7e..10332f0 100644
--- a/system/core/Output.php
+++ b/system/core/Output.php
@@ -701,7 +701,7 @@
 		else
 		{
 			header('Pragma: public');
-			header('Cache-Control: max-age=' . $max_age . ', public');
+			header('Cache-Control: max-age='.$max_age.', public');
 			header('Expires: '.gmdate('D, d M Y H:i:s', $expiration).' GMT');
 			header('Last-modified: '.gmdate('D, d M Y H:i:s', $last_modified).' GMT');
 		}