diff --git a/src/core/browserfs.ts b/src/core/browserfs.ts
index 3d3092fc..94906b90 100644
--- a/src/core/browserfs.ts
+++ b/src/core/browserfs.ts
@@ -13,7 +13,7 @@ import * as BFSUtils from './util';
 import * as Errors from './api_error';
 import setImmediate from '../generic/setImmediate';
 
-if ((<any> process)['initializeTTYs']) {
+if (process && (<any> process)['initializeTTYs']) {
   (<any> process)['initializeTTYs']();
 }
 
diff --git a/src/core/global.ts b/src/core/global.ts
index b14ec46f..7e947a13 100644
--- a/src/core/global.ts
+++ b/src/core/global.ts
@@ -6,9 +6,9 @@
  * @hidden
  * @private
  */
-declare var global: any;
+declare var globalThis: any;
 /**
  * @hidden
  */
-const toExport: any = typeof(window) !== 'undefined' ? window : typeof(self) !== 'undefined' ? self : global;
+const toExport: any = typeof(window) !== 'undefined' ? window : typeof(self) !== 'undefined' ? self : typeof (global) !== "undefined" ? global : globalThis;
 export default toExport;