diff --git a/core/lib/Drupal/Core/Cache/DatabaseBackend.php b/core/lib/Drupal/Core/Cache/DatabaseBackend.php
index f7c7744..5ae4b7a 100755
--- a/core/lib/Drupal/Core/Cache/DatabaseBackend.php
+++ b/core/lib/Drupal/Core/Cache/DatabaseBackend.php
@@ -215,7 +215,7 @@ public function doSetMultiple(array $items) {
       );
 
       // If maximum expiration is set, enforce an upper limit on the expiry.
-      if ($max_lifetime != Cache::PERMANENT && ($item['expire'] == Cache::PERMANENT || $item['expire'] > $max_lifetime)) {
+      if ($max_lifetime !== Cache::PERMANENT && ($item['expire'] === Cache::PERMANENT || $item['expire'] > $max_lifetime)) {
         $item['expire'] = $max_lifetime;
       }