diff --git a/resources/check_auth.php b/resources/check_auth.php
index 6e17ab6fe8..161e626d33 100644
--- a/resources/check_auth.php
+++ b/resources/check_auth.php
@@ -44,12 +44,12 @@
 	}
 
 //regenerate sessions to avoid session id attacks such as session fixation
-	if (array_key_exists('security',$_SESSION) && $_SESSION['security']['session_rotate']['boolean'] == "true") {
+	if (isset($_SESSION['authorized']) && $_SESSION['authorized']) {
 		$_SESSION['session']['last_activity'] = time();
 		if (!isset($_SESSION['session']['created'])) {
 			$_SESSION['session']['created'] = time();
-		} else if (time() - $_SESSION['session']['created'] > 28800) {
-			// session started more than 8 hours ago
+		} elseif (time() - $_SESSION['session']['created'] > 28800) {
+			//session started more than 8 hours ago
 			session_regenerate_id(true);    // rotate the session id
 			$_SESSION['session']['created'] = time();  // update creation time
 		}