diff --git a/core/lib/Drupal/Core/Cache/StaticCache/StaticCache.php b/core/lib/Drupal/Core/Cache/StaticCache/StaticCache.php
index ee47756..b252807 100644
--- a/core/lib/Drupal/Core/Cache/StaticCache/StaticCache.php
+++ b/core/lib/Drupal/Core/Cache/StaticCache/StaticCache.php
@@ -38,7 +38,7 @@ protected function prepareItem($cache, $allow_invalid) {
     // Check expire time.
     $cache->valid = $cache->expire == Cache::PERMANENT || $cache->expire >= $this->getRequestTime();
 
-    if (!$allow_invalid && !$prepared->valid) {
+    if (!$allow_invalid && !$cache->valid) {
       return FALSE;
     }