diff --git a/Classes/ViewHelpers/String/SanitizeCsvCellViewHelper.php b/Classes/ViewHelpers/String/SanitizeCsvCellViewHelper.php
index 2483b04b..2b01775c 100644
--- a/Classes/ViewHelpers/String/SanitizeCsvCellViewHelper.php
+++ b/Classes/ViewHelpers/String/SanitizeCsvCellViewHelper.php
@@ -18,6 +18,6 @@ class SanitizeCsvCellViewHelper extends AbstractViewHelper
      */
     public function render(): string
     {
-        return CsvUtility::sanitizeCell($this->renderChildren());
+        return CsvUtility::sanitizeCell((string)$this->renderChildren());
     }
 }