diff --git a/packages/vite/src/node/ssr/fetchModule.ts b/packages/vite/src/node/ssr/fetchModule.ts
index e62d5b25d1f2d3..855e3c2b467133 100644
--- a/packages/vite/src/node/ssr/fetchModule.ts
+++ b/packages/vite/src/node/ssr/fetchModule.ts
@@ -77,7 +77,7 @@ export async function fetchModule(
       throw err
     }
     const file = pathToFileURL(resolved.id).toString()
-    const type = isFilePathESM(file, server.config.packageCache)
+    const type = isFilePathESM(resolved.id, server.config.packageCache)
       ? 'module'
       : 'commonjs'
     return { externalize: file, type }