diff --git a/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php b/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php
index fa7a56e..ff90824 100644
--- a/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php
+++ b/core/lib/Drupal/Core/Render/MainContent/HtmlRenderer.php
@@ -107,8 +107,8 @@ public function __construct(TitleResolverInterface $title_resolver, PluginManage
   public function renderResponse(array $main_content, Request $request, RouteMatchInterface $route_match) {
     list($page, $title) = $this->prepare($main_content, $request, $route_match);
 
-    if (!isset($page['#type']) || $page['#type'] !== 'page') {
-      throw new \LogicException('Must be #type page');
+    if (!isset($page['#type']) || $page['#type'] !== 'body') {
+      throw new \LogicException('Must be #type body');
     }
 
     $page['#title'] = $title;