--- a/header.php
+++ b/header.php
@@ -132,7 +132,7 @@
 if(isset($PHP_SELF)) $PHP_SELF = htmlspecialchars(descript($PHP_SELF), ENT_QUOTES);
 
 // Set these variables to start.
-$agecontsent = false; $viewed = false; 
+$agecontsent = false; $viewed = array(); 
 
 require_once("includes/get_session_vars.php");