diff --git a/packages/vitest/rollup.config.js b/packages/vitest/rollup.config.js
index 3f7ab46a8b43..624d90787adc 100644
--- a/packages/vitest/rollup.config.js
+++ b/packages/vitest/rollup.config.js
@@ -67,6 +67,7 @@ const external = [
   'vite-node/utils',
   '@vitest/utils/diff',
   '@vitest/utils/error',
+  '@vitest/utils/source-map',
   '@vitest/runner/utils',
   '@vitest/runner/types',
   '@vitest/snapshot/environment',