diff --git a/typo3/sysext/backend/Classes/Form/Element/TextElement.php b/typo3/sysext/backend/Classes/Form/Element/TextElement.php
index f2e820116b6797457e50202c73ac1a21f9003de7..76d3832a0307ee88c87aeff634d70a0486ef2a0c 100644
--- a/typo3/sysext/backend/Classes/Form/Element/TextElement.php
+++ b/typo3/sysext/backend/Classes/Form/Element/TextElement.php
@@ -124,7 +124,7 @@ class TextElement extends AbstractFormElement
             $html[] =       '<div class="form-wizards-element">';
             $html[] =           '<div class="form-control-wrap"' . ($width ? ' style="max-width: ' . $width . 'px">' : '>');
             $html[] =               '<textarea class="form-control" rows="' . $rows . '" disabled>';
-            $html[] =                   htmlspecialchars($itemValue);
+            $html[] =                   htmlspecialchars((string)$itemValue);
             $html[] =               '</textarea>';
             $html[] =           '</div>';
             $html[] =       '</div>';