diff --git a/wp-db-backup.php b/wp-db-backup.php
index a0bc3ec..530bb08 100755
--- a/wp-db-backup.php
+++ b/wp-db-backup.php
@@ -219,7 +219,7 @@ function set_page_url() {
 	 * Add a link to back up your database when doing a core upgrade 
 	 */
 	function update_notice_action() {
-		if ( 'upgrade-core' == $_REQUEST['action'] ) :
+		if ( isset( $_REQUEST['action'] ) || 'upgrade-core' == $_REQUEST['action'] ) :
 			ob_start(array(&$this, 'update_notice'));
 			add_action('admin_footer', create_function('', 'ob_end_flush();'));
 		endif;