diff --git a/rollup.config.js b/rollup.config.js
index 43eb40663..86ff773aa 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -3,11 +3,14 @@ import nodeResolve from "rollup-plugin-node-resolve";
 import builtins from "rollup-plugin-node-builtins";
 import globals from "rollup-plugin-node-globals";
 
+const sinon = require("./lib/sinon.js");
+
 export default {
     input: "./lib/sinon.js",
     output: {
         file: "pkg/sinon-esm.js",
-        format: "es"
+        format: "es",
+        outro: Object.keys(sinon).map((key) => `const _${key} = sinon.${key};\nexport { _${key} as ${key} };`).join('\n')
     },
     plugins: [
         nodeResolve({