diff --git a/core/lib/Drupal/Core/Plugin/Discovery/CacheDecorator.php b/core/lib/Drupal/Core/Plugin/Discovery/CacheDecorator.php
index 09f1e0e..02611b0 100644
--- a/core/lib/Drupal/Core/Plugin/Discovery/CacheDecorator.php
+++ b/core/lib/Drupal/Core/Plugin/Discovery/CacheDecorator.php
@@ -9,6 +9,7 @@
 
 use Drupal\Component\Plugin\Discovery\CachedDiscoveryInterface;
 use Drupal\Component\Plugin\Discovery\DiscoveryInterface;
+use Drupal\Core\Cache\CacheBackendInterface;
 
 /**
  * Enables static and persistent caching of discovered plugin definitions.
@@ -30,6 +31,20 @@ class CacheDecorator implements CachedDiscoveryInterface {
   protected $cacheBin;
 
   /**
+   * The timestamp indicating when the definition list cache expires.
+   *
+   * @var int
+   */
+  protected $cacheExpire;
+
+  /**
+   * The cache tags associated with the definition list.
+   *
+   * @var array
+   */
+  protected $cacheTags;
+
+  /**
    * The plugin definitions of the decorated discovery class.
    *
    * @var array
@@ -54,11 +69,18 @@ class CacheDecorator implements CachedDiscoveryInterface {
    *   The cache identifier used for storage of the definition list.
    * @param string $cache_bin
    *   The cache bin used for storage and retrieval of the definition list.
+   * @param int $cache_expire
+   *   A Unix timestamp indicating that the definition list will be considered
+   *   invalid after this time.
+   * @param array $cache_tags
+   *   The cache tags associated with the definition list
    */
-  public function __construct(DiscoveryInterface $decorated, $cache_key, $cache_bin = 'cache') {
+  public function __construct(DiscoveryInterface $decorated, $cache_key, $cache_bin = 'cache', $cache_expire = CacheBackendInterface::CACHE_PERMANENT, array $cache_tags = array()) {
     $this->decorated = $decorated;
     $this->cacheKey = $cache_key;
     $this->cacheBin = $cache_bin;
+    $this->cacheExpire = $cache_expire;
+    $this->cacheTags = $cache_tags;
   }
 
   /**
@@ -124,7 +146,7 @@ protected function getCachedDefinitions() {
    */
   protected function setCachedDefinitions($definitions) {
     if (isset($this->cacheKey)) {
-      cache($this->cacheBin)->set($this->cacheKey, $definitions);
+      cache($this->cacheBin)->set($this->cacheKey, $definitions, $this->cacheExpire, $this->cacheTags);
     }
     $this->definitions = $definitions;
   }
@@ -145,4 +167,5 @@ public function clearCachedDefinitions() {
   public function __call($method, $args) {
     return call_user_func_array(array($this->decorated, $method), $args);
   }
+
 }
diff --git a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/FetcherManager.php b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/FetcherManager.php
index f2fd0f7..fa63c23 100644
--- a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/FetcherManager.php
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/FetcherManager.php
@@ -10,6 +10,7 @@
 use Drupal\Component\Plugin\PluginManagerBase;
 use Drupal\Component\Plugin\Factory\DefaultFactory;
 use Drupal\Core\Plugin\Discovery\AnnotatedClassDiscovery;
+use Drupal\Core\Plugin\Discovery\CacheDecorator;
 
 /**
  * Manages aggregator fetcher plugins.
@@ -18,6 +19,7 @@ class FetcherManager extends PluginManagerBase {
 
   public function __construct() {
     $this->discovery = new AnnotatedClassDiscovery('aggregator', 'fetcher');
+    $this->discovery = new CacheDecorator($this->discovery, 'aggregator_fetcher:' . language(LANGUAGE_TYPE_INTERFACE)->langcode);
     $this->factory = new DefaultFactory($this->discovery);
   }
 }