diff --git a/src/EventSubscriber/MigrationSubscriber.php b/src/EventSubscriber/MigrationSubscriber.php
index d01f065..b65d83c 100644
--- a/src/EventSubscriber/MigrationSubscriber.php
+++ b/src/EventSubscriber/MigrationSubscriber.php
@@ -54,8 +54,10 @@ class MigrationSubscriber implements EventSubscriberInterface {
    * {@inheritdoc}
    */
   public static function getSubscribedEvents() {
-    return [
-      MigrateEvents::POST_ROW_SAVE => ['onMigrationPostRowSave'],
-    ];
+    $return = [];
+    if (class_exists('\Drupal\migrate\Event\MigrateEvents')) {
+      $return[MigrateEvents::POST_ROW_SAVE][] = 'onMigrationPostRowSave';
+    }
+    return $return;
   }
 }