diff -u b/core/modules/migrate_drupal/src/Plugin/migrate/FieldMigration.php b/core/modules/migrate_drupal/src/Plugin/migrate/FieldMigration.php
--- b/core/modules/migrate_drupal/src/Plugin/migrate/FieldMigration.php
+++ b/core/modules/migrate_drupal/src/Plugin/migrate/FieldMigration.php
@@ -122,7 +122,15 @@
           if (!isset($this->fieldPluginCache[$field_type])) {
             $this->fieldPluginCache[$field_type] = $this->fieldPluginManager->createInstance($plugin_id, [], $this);
           }
-          call_user_func([$this->fieldPluginCache[$field_type], $this->pluginDefinition['field_plugin_method']], $this);
+          if (!empty($this->pluginDefinition['field_plugin_method'])) {
+            $method = $this->pluginDefinition['field_plugin_method'];
+          }
+          else {
+            // For backwards compatibility, fallback to the old
+            // cck_plugin_method.
+            $method = $this->pluginDefinition['cck_plugin_method'];
+          }
+          call_user_func([$this->fieldPluginCache[$field_type], $method], $this);
         }
       }
     }