diff --git a/core/modules/views/lib/Drupal/views/Plugin/views/style/StylePluginBase.php b/core/modules/views/lib/Drupal/views/Plugin/views/style/StylePluginBase.php
index 5f993d4..5232665 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/views/style/StylePluginBase.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/views/style/StylePluginBase.php
@@ -463,7 +463,7 @@ function render_grouping_sets($sets, $level = 0) {
             $this->view->row_index = $index;
             $render = $this->view->rowPlugin->render($row);
             // Row render arrays cannot be contained by style render arrays.
-            $set['rows'][$index] = drupal_render($render);
+            $set['rows'][$index] = $render;
           }
         }
 
diff --git a/core/modules/views/views.theme.inc b/core/modules/views/views.theme.inc
index 44f48f6..8e0009a 100644
--- a/core/modules/views/views.theme.inc
+++ b/core/modules/views/views.theme.inc
@@ -305,7 +305,7 @@ function theme_views_view_grouping($vars) {
 
   $output = '<div class="view-grouping">';
   $output .= '<div class="view-grouping-header">' . $title . '</div>';
-  $output .= '<div class="view-grouping-content">' . $content . '</div>' ;
+  $output .= '<div class="view-grouping-content">' . drupal_render($content) . '</div>' ;
   $output .= '</div>';
 
   return $output;