diff --git a/src/Plugin/Field/FieldFormatter/AddressDefaultFormatter.php b/src/Plugin/Field/FieldFormatter/AddressDefaultFormatter.php
index 936f251..5484bc8 100644
--- a/src/Plugin/Field/FieldFormatter/AddressDefaultFormatter.php
+++ b/src/Plugin/Field/FieldFormatter/AddressDefaultFormatter.php
@@ -18,6 +18,15 @@ use Drupal\Core\Language\LanguageInterface;
 use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
 use Drupal\Core\Render\Element;
 use Symfony\Component\DependencyInjection\ContainerInterface;
+// @codingStandardsIgnoreStart
+// @todo remove this BC layer once support for Drupal 8.7 is sunsetted
+if (interface_exists('\Drupal\Core\Security\TrustedCallbackInterface')) {
+  interface TrustedCallbackInterface extends \Drupal\Core\Security\TrustedCallbackInterface {}
+}
+else {
+  interface TrustedCallbackInterface {}
+}
+// @codingStandardsIgnoreStop
 
 /**
  * Plugin implementation of the 'address_default' formatter.
@@ -30,7 +39,7 @@ use Symfony\Component\DependencyInjection\ContainerInterface;
  *   },
  * )
  */
-class AddressDefaultFormatter extends FormatterBase implements ContainerFactoryPluginInterface {
+class AddressDefaultFormatter extends FormatterBase implements ContainerFactoryPluginInterface, TrustedCallbackInterface {
 
   /**
    * The address format repository.
@@ -285,4 +294,11 @@ class AddressDefaultFormatter extends FormatterBase implements ContainerFactoryP
     return $values;
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public static function trustedCallbacks() {
+    return ['postRender'];
+  }
+
 }