diff --git a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/aggregator/fetcher/DefaultFetcher.php b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/aggregator/fetcher/DefaultFetcher.php
index a5a04cd..07aaf6e 100644
--- a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/aggregator/fetcher/DefaultFetcher.php
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/aggregator/fetcher/DefaultFetcher.php
@@ -12,7 +12,7 @@
 use Drupal\aggregator\Plugin\Core\Entity\Feed;
 use Drupal\Core\Annotation\Translation;
 use Drupal\Core\Plugin\ContainerFactoryPluginBase;
-use Guzzle\Http\Client;
+use Guzzle\Http\ClientInterface;
 use Guzzle\Http\Exception\BadResponseException;
 use Guzzle\Http\Exception\RequestException;
 use Symfony\Component\DependencyInjection\ContainerInterface;
@@ -33,17 +33,17 @@ class DefaultFetcher extends ContainerFactoryPluginBase implements FetcherInterf
   /**
    * The HTTP client to fetch the feed data with.
    *
-   * @var \Guzzle\Http\Client
+   * @var \Guzzle\Http\ClientInterface
    */
   protected $httpClient;
 
   /**
    * Constructs a DefaultFetcher object.
    *
-   * @param \Guzzle\Http\Client $http_client
+   * @param \Guzzle\Http\ClientInterface $http_client
    *   A Guzzle client object.
    */
-  public function __construct(Client $http_client) {
+  public function __construct(ClientInterface $http_client) {
     $this->httpClient = $http_client;
   }