diff --git a/core/modules/views/views_ui/lib/Drupal/views_ui/ViewUI.php b/core/modules/views/views_ui/lib/Drupal/views_ui/ViewUI.php
index 059ca8a..dda1c01 100644
--- a/core/modules/views/views_ui/lib/Drupal/views_ui/ViewUI.php
+++ b/core/modules/views/views_ui/lib/Drupal/views_ui/ViewUI.php
@@ -9,6 +9,7 @@
 
 use Drupal\views\ViewExecutable;
 use Drupal\Core\Database\Database;
+use Drupal\views\Plugin\views\query\Sql;
 
 /**
  * Stores UI related temporary settings.
@@ -1792,7 +1793,7 @@ public function renderPreview($display_id, $args = array()) {
             // Only the sql default class has a method getArguments.
             $quoted = array();
 
-            if (get_class($this->query) == 'Drupal\views\Plugin\views\query\Sql') {
+            if ($this->query instanceof Sql) {
               $quoted = $query->getArguments();
               $connection = Database::getConnection();
               foreach ($quoted as $key => $val) {