diff -u b/core/modules/file/src/Plugin/migrate/cckfield/d6/FileField.php b/core/modules/file/src/Plugin/migrate/cckfield/d6/FileField.php
--- b/core/modules/file/src/Plugin/migrate/cckfield/d6/FileField.php
+++ b/core/modules/file/src/Plugin/migrate/cckfield/d6/FileField.php
@@ -14,7 +14,7 @@
 /**
  * @MigrateCckField(
  *   id = "filefield",
- *   field_type = "file",
+ *   field_type = "filefield",
  *   core = {6}
  * )
  */
diff -u b/core/modules/migrate_drupal/src/Plugin/MigrateCckFieldPluginManager.php b/core/modules/migrate_drupal/src/Plugin/MigrateCckFieldPluginManager.php
--- b/core/modules/migrate_drupal/src/Plugin/MigrateCckFieldPluginManager.php
+++ b/core/modules/migrate_drupal/src/Plugin/MigrateCckFieldPluginManager.php
@@ -52,7 +52,7 @@
   public function createInstance($field_type, array $configuration = array(), MigrationInterface $migration = NULL) {
     foreach ($this->getDefinitions() as $plugin_id => $definition) {
       if (in_array($configuration['core'], $definition['core'])) {
-        if ($field_type == $definition['field_type'] || $field_type == $plugin_id) {
+        if ($field_type === $definition['field_type'] || $field_type === $plugin_id) {
           return parent::createInstance($plugin_id, $configuration, $migration);
         }
       }
only in patch2:
unchanged:
--- a/core/modules/migrate_drupal/src/Plugin/migrate/builder/d6/CckMigration.php
+++ b/core/modules/migrate_drupal/src/Plugin/migrate/builder/d6/CckMigration.php
@@ -57,7 +57,7 @@ public function buildMigrations(array $template) {
         // Allow the cckfield plugin to alter the migration as necessary so that
         // it knows how to handle fields of this type.
         $this->cckPluginManager
-          ->createInstance($field_type, [], $migration)
+          ->createInstance($field_type, ['core' => 6], $migration) 
           ->{$this->configuration['cck_plugin_method']}($migration);
       }
     }