diff --git a/build/packages/config.js b/build/packages/config.js
index ace9db4e..18feb3d5 100644
--- a/build/packages/config.js
+++ b/build/packages/config.js
@@ -35,6 +35,7 @@ function genConfig(opts) {
         }),
         babel({
           exclude: 'node_modules/**',
+          runtimeHelpers: true,
         }),
       ],
       external(id) { return !/^[\.\/]/.test(id) },