diff --git a/core/lib/Drupal/Core/StackMiddleware/BrowserBugsFormatNegotiator.php b/core/lib/Drupal/Core/StackMiddleware/BrowserBugsFormatNegotiator.php
index 7a08446..8007d88 100644
--- a/core/lib/Drupal/Core/StackMiddleware/BrowserBugsFormatNegotiator.php
+++ b/core/lib/Drupal/Core/StackMiddleware/BrowserBugsFormatNegotiator.php
@@ -35,6 +35,13 @@ public function __construct(FormatNegotiatorInterface $format_negotiator) {
   /**
    * {@inheritdoc}
    */
+  public function __call($name, $arguments) {
+    return call_user_func_array([$this, $name], $arguments);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function getBestFormat($acceptHeader, array $priorities = array()) {
     return $this->formatNegotiator->getBestFormat($acceptHeader, $priorities);
   }