diff --git a/packages/engine/src/engine-core.ts b/packages/engine/src/engine-core.ts
index 204b9b30a..2b59ba1b6 100644
--- a/packages/engine/src/engine-core.ts
+++ b/packages/engine/src/engine-core.ts
@@ -54,7 +54,7 @@ import {
 } from '@alilc/lowcode-shell';
 import { isPlainObject } from '@alilc/lowcode-utils';
 import './modules/live-editing';
-import classes from './modules/classes';
+import * as classes from './modules/classes';
 import symbols from './modules/symbols';
 import { componentMetaParser } from './inner-plugins/component-meta-parser';
 import { setterRegistry } from './inner-plugins/setter-registry';