diff --git a/Classes/ViewHelpers/MetadataWrapVariableViewHelper.php b/Classes/ViewHelpers/MetadataWrapVariableViewHelper.php
index 5f8771e2d..c39e191ea 100644
--- a/Classes/ViewHelpers/MetadataWrapVariableViewHelper.php
+++ b/Classes/ViewHelpers/MetadataWrapVariableViewHelper.php
@@ -71,9 +71,9 @@ public static function renderStatic(
         $parser = GeneralUtility::makeInstance(TypoScriptParser::class);
         $parser->parse($renderChildrenClosure());
         $wrap = [
-            'key' => $parser->setup['key.'],
-            'value' => $parser->setup['value.'],
-            'all' => $parser->setup['all.'],
+            'key' => $parser->setup['key.'] ?? '',
+            'value' => $parser->setup['value.'] ?? '',
+            'all' => $parser->setup['all.'] ?? '',
         ];
         $renderingContext->getVariableProvider()->add($arguments['name'], $wrap);
     }