diff --git a/semanticviews_plugin_row_fields.inc b/semanticviews_plugin_row_fields.inc
index 5b0d585..918bc4e 100644
--- a/semanticviews_plugin_row_fields.inc
+++ b/semanticviews_plugin_row_fields.inc
@@ -43,7 +43,7 @@ class semanticviews_plugin_row_fields extends views_plugin_row {
           '#title' => $handler->label() ? $handler->label() : $handler->ui_name(),
           '#type' => 'fieldset',
           '#attributes' => array(
-            'class' => 'clear-block',
+            'class' => array('clear-block'),
           ),
         );
         $form['semantic_html'][$field]['element_type'] = array(
diff --git a/semanticviews_plugin_style_default.inc b/semanticviews_plugin_style_default.inc
index 70fa172..4015a33 100644
--- a/semanticviews_plugin_style_default.inc
+++ b/semanticviews_plugin_style_default.inc
@@ -66,7 +66,7 @@ class semanticviews_plugin_style_default extends views_plugin_style {
       '#title' => t('Grouping title'),
       '#description' => t('If using groups, the view will insert the grouping’s title field.'),
       '#attributes' => array(
-        'class' => 'clear-block',
+        'class' => array('clear-block'),
       ),
     );
     $form['group']['element_type'] = array(