diff --git a/core/includes/form.inc b/core/includes/form.inc
index c3b9c02..52dd2ef 100644
--- a/core/includes/form.inc
+++ b/core/includes/form.inc
@@ -2589,7 +2589,7 @@ function theme_form($variables) {
 function template_preprocess_textarea(&$variables) {
   $element = $variables['element'];
   element_set_attributes($element, array('id', 'name', 'rows', 'cols', 'placeholder'));
-  _form_set_attributes($element,array('form-textarea'));
+  _form_set_attributes($element, array('form-textarea'));
   $variables['wrapper_attributes'] = new Attribute(array(
     'class' => array('form-textarea-wrapper'),
   ));