diff --git a/t3lib/class.t3lib_tceforms.php b/t3lib/class.t3lib_tceforms.php
index b16e9663f07440cc700e36d5736431cab8167d8e..adb217c8e20b96e57bb1b172f7175af700a54b26 100644
--- a/t3lib/class.t3lib_tceforms.php
+++ b/t3lib/class.t3lib_tceforms.php
@@ -5301,6 +5301,7 @@ class t3lib_TCEforms {
 
 				// make textareas resizable and flexible
 			if (!($GLOBALS['BE_USER']->uc['resizeTextareas'] == '0' && $GLOBALS['BE_USER']->uc['resizeTextareas_Flexible'] == '0')) {
+				$pageRenderer->addCssFile($this->backPath . '../t3lib/js/extjs/ux/resize.css');
 				$this->loadJavascriptLib('../t3lib/js/extjs/ux/Ext.ux.elasticTextArea.js');
 			}
 			$resizableSettings = array(