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 8f8a3d6..fe89adf 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
@@ -404,7 +404,7 @@ function pre_render($result) {
   /**
    * Renders a single view of a grouped content.
    */
-  public function renderSingle(array $rows = array()) {
+  protected function renderSingle(array $rows = array()) {
     return array(
       '#theme' => $this->themeFunctions(),
       '#view' => $this->view,