diff --git a/src/vs/base/browser/browser.ts b/src/vs/base/browser/browser.ts
index 31038fa56dc1d608e5cd659059d4b28b206f050e..513203741e1f6a2c969fc134f7da7a1c536b771b 100644
--- a/src/vs/base/browser/browser.ts
+++ b/src/vs/base/browser/browser.ts
@@ -55,7 +55,6 @@ var globals = <IGlobalScope><any> (typeof self === 'object' ? self : global);
 
 var userAgent = globals.navigator ? globals.navigator.userAgent : '';
 var isTest = !!globals.isTest;
-var isPseudo = globals.document && globals.document.URL.match(/[^\?]*\?[^\#]*pseudo=true/);
 
 // DOCUMENTED FOR FUTURE REFERENCE:
 // When running IE11 in IE10 document mode, the code below will identify the browser as being IE10,
diff --git a/src/vs/nls.js b/src/vs/nls.js
index 90214658a15bcafc5f915652b9fc9a8e5d35d779..3687ff29b8a1452bd43eb324e729927c66970de5 100644
--- a/src/vs/nls.js
+++ b/src/vs/nls.js
@@ -22,7 +22,7 @@ var NLSLoaderPlugin;
     var global = _nlsPluginGlobal;
     var Resources = global.Plugin && global.Plugin.Resources ? global.Plugin.Resources : undefined;
     var DEFAULT_TAG = 'i-default';
-    var IS_PSEUDO = (global && global.document && global.document.URL.match(/[^\?]*\?[^\#]*pseudo=true/));
+    var IS_PSEUDO = (global && global.document && global.document.location && global.document.location.hash.indexOf('pseudo=true') >= 0);
     var slice = Array.prototype.slice;
     function _format(message, args) {
         var result;