diff --git a/start.php b/start.php
index 25bb11b..ed9a61c 100644
--- a/start.php
+++ b/start.php
@@ -11,7 +11,8 @@
     $error = 0;
     $values = null;
     $uid = $_GET['uid'];
-    $length = ($_GET['length'] && gettype(+$_GET['length']) == 'integer') ? +$_GET['length'] : 10;
+    $length = $_GET['length'];
+    $length = (($length === '0') || ($length && gettype(+$length) == 'integer')) ? +$_GET['length'] : 10;
     $database = new Database();
     $questions_count = $database->query('SELECT COUNT(*) FROM "Questions"')['data'][0]['count'];
     if($length == 0) {