diff --git a/core/modules/migrate/migrate.module b/core/modules/migrate/migrate.module
index f304aa9..90340e7 100644
--- a/core/modules/migrate/migrate.module
+++ b/core/modules/migrate/migrate.module
@@ -34,6 +34,9 @@ function migrate_migration_plugins_alter(&$definitions) {
   foreach ($definitions as &$definition) {
     $destination = $migrate_plugin_manager->getDefinition($definition['destination']['plugin'], FALSE);
     if (!empty($destination['class'])) {
+      $definition += [
+        'migration_tags' => [],
+      ];
       if ((is_a($destination['class'], EntityConfigBase::class, TRUE)
         || is_a($destination['class'], Config::class, TRUE)
         || is_a($destination['class'], ComponentEntityDisplayBase::class, TRUE))