diff --git a/t3lib/class.t3lib_tceforms.php b/t3lib/class.t3lib_tceforms.php
index ce88bca..a1e22e7 100644
--- a/t3lib/class.t3lib_tceforms.php
+++ b/t3lib/class.t3lib_tceforms.php
@@ -3675,7 +3675,8 @@ class t3lib_TCEforms {
 			// Create selector box of the options
 		$sSize = $params['autoSizeMax'] ? t3lib_div::intInRange($itemArrayC + 1, t3lib_div::intInRange($params['size'], 1), $params['autoSizeMax']) : $params['size'];
 		if (!$selector) {
-			$selector = '<select id="' . uniqid('tceforms-multiselect-') . '" ' . ($params['noList'] ? 'style="display: none"' : 'size="' . $sSize . '"' . $this->insertDefStyle('group', 'tceforms-multiselect')) . ' multiple="multiple" name="' . $fName . '_list" ' . $onFocus . $params['style'] . $disabled . '>' . implode('', $opt) . '</select>';
+			$isMultiple = ($params['size'] != 1 && $params['multiple']);
+			$selector = '<select id="' . uniqid('tceforms-multiselect-') . '" ' . ($params['noList'] ? 'style="display: none"' : 'size="' . $sSize . '"' . $this->insertDefStyle('group', 'tceforms-multiselect')) . ($isMultiple ? ' multiple="multiple"' : '') . ' name="' . $fName . '_list" ' . $onFocus . $params['style'] . $disabled . '>' . implode('', $opt) . '</select>';
 		}