diff --git a/core/lib/Drupal/Core/Cache/DatabaseBackend.php b/core/lib/Drupal/Core/Cache/DatabaseBackend.php
index 69d27e9..8f9cb44 100644
--- a/core/lib/Drupal/Core/Cache/DatabaseBackend.php
+++ b/core/lib/Drupal/Core/Cache/DatabaseBackend.php
@@ -162,7 +162,7 @@ protected function prepareItem($cache, $allow_invalid) {
   public function set($cid, $data, $expire = Cache::PERMANENT, array $tags = array()) {
     // Check if maximum expiration settings for cache bin is defined
     if (isset($this->configuration['max_expire']) && ($expire == Cache::PERMANENT || $expire > $this->configuration['max_expire'])) {
-      $expire = $this->configuration['max_expire'];
+      $expire = REQUEST_TIME + $this->configuration['max_expire'];
     }
     Cache::validateTags($tags);
     $tags = array_unique($tags);
diff --git a/core/modules/system/src/Tests/Cache/DatabaseBackendUnitTest.php b/core/modules/system/src/Tests/Cache/DatabaseBackendUnitTest.php
index f15aef9..434d53d 100644
--- a/core/modules/system/src/Tests/Cache/DatabaseBackendUnitTest.php
+++ b/core/modules/system/src/Tests/Cache/DatabaseBackendUnitTest.php
@@ -58,18 +58,18 @@ public function testCacheBinExpiration(){
     $backend = new DatabaseBackend($this->container->get('database'), $this->container->get('cache_tags.invalidator.checksum'), 'render', $configuration);
     $backend->set('test_cache1', 'foo');
     $cached = $backend->get('test_cache1', true);
-    $this->assertIdentical($cached->expire, '2800', 'Maximum cache expire time is correct.');
+    $this->assertIdentical($cached->expire, (string) (REQUEST_TIME + 2800), 'Maximum cache expire time is correct.');
 
     $configuration = array('max_expire' => 2799);
     $backend = new DatabaseBackend($this->container->get('database'), $this->container->get('cache_tags.invalidator.checksum'), 'render', $configuration);
     $backend->set('test_cache1', 'foo');
     $cached = $backend->get('test_cache1', true);
-    $this->assertIdentical($cached->expire, '2799', 'Maximum cache expire time is correct.');
+    $this->assertIdentical($cached->expire, (string) (REQUEST_TIME + 2799), 'Maximum cache expire time is correct.');
 
     $configuration = array('max_expire' => 2801);
     $backend = new DatabaseBackend($this->container->get('database'), $this->container->get('cache_tags.invalidator.checksum'), 'render', $configuration);
     $backend->set('test_cache1', 'foo');
     $cached = $backend->get('test_cache1', true);
-    $this->assertIdentical($cached->expire, '2801', 'Maximum cache expire time is correct.');
+    $this->assertIdentical($cached->expire, (string) (REQUEST_TIME + 2801), 'Maximum cache expire time is correct.');
   }
 }
diff --git a/sites/default/default.settings.php b/sites/default/default.settings.php
index be8887c..17e8215 100755
--- a/sites/default/default.settings.php
+++ b/sites/default/default.settings.php
@@ -697,10 +697,5 @@
  *
  * Use this setting to set the maximum cache expiration time for a specific
  * cache bin in the database.
- *
- * For example:
- * @code 
- * settings['cache_database']['render'] = 3600;
- * @endcode
  */
-# $settings['cache_database'][''] = 0;
+$settings['cache_database']['render'] = 604800;