diff --git a/packages/nitro/src/targets/worker.ts b/packages/nitro/src/targets/worker.ts
index 687d4a25e8..f0dd931831 100644
--- a/packages/nitro/src/targets/worker.ts
+++ b/packages/nitro/src/targets/worker.ts
@@ -5,8 +5,8 @@ import { SLSTarget } from '../config'
 const polyfill = `
 const exports = {};
 const module = { exports };
-const global = { process: {} };
-const window = global;
+const global = typeof globalThis !== 'undefined' ? globalThis : "undefined" !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
+global.process = global.process || {};
 (function(){const o=Date.now(),t=()=>Date.now()-o;global.process.hrtime=o=>{const e=Math.floor(.001*(Date.now()-t())),n=.001*t();let a=Math.floor(n)+e,r=Math.floor(n%1*1e9);return o&&(a-=o[0],r-=o[1],r<0&&(a--,r+=1e9)),[a,r]};})();
 `