diff --git a/Classes/Form/Element/ReadabilityAnalysis.php b/Classes/Form/Element/ReadabilityAnalysis.php
index adc660d7..df309273 100644
--- a/Classes/Form/Element/ReadabilityAnalysis.php
+++ b/Classes/Form/Element/ReadabilityAnalysis.php
@@ -18,7 +18,7 @@ public function render(): array
 
         $allowedDoktypes = YoastUtility::getAllowedDoktypes();
         if ($this->data['tableName'] === 'pages'
-            && !\in_array((int)$this->data['databaseRow']['doktype'][0], $allowedDoktypes)) {
+            && !\in_array((int)($this->data['databaseRow']['doktype'][0] ?? 0), $allowedDoktypes)) {
             $templateView->assign('wrongDoktype', true);
         }
         $templateView->assign('subtype', '');