diff --git a/core/modules/migrate/src/MigrateExecutable.php b/core/modules/migrate/src/MigrateExecutable.php
index eacf9ae1df6035061c159c2a30da5ddd166a52df..9c27514228f404dd720d35201a5e847fed2616ea 100644
--- a/core/modules/migrate/src/MigrateExecutable.php
+++ b/core/modules/migrate/src/MigrateExecutable.php
@@ -94,6 +94,15 @@ class MigrateExecutable implements MigrateExecutableInterface {
    */
   protected $eventDispatcher;
 
+  /**
+   * Migration message service.
+   *
+   * @todo https://www.drupal.org/node/2822663 Make this protected.
+   *
+   * @var \Drupal\migrate\MigrateMessageInterface
+   */
+  public $message;
+
   /**
    * Constructs a MigrateExecutable and verifies and sets the memory limit.
    *