diff --git a/lib/helpers.js b/lib/helpers.js
index 6f651ed..fbf3cdc 100644
--- a/lib/helpers.js
+++ b/lib/helpers.js
@@ -93,9 +93,9 @@ helpers.escape = function(text) {
   });
 };
 
-helpers.parseTags = function(text) {
+helpers.parseTags = function(text, screen) {
   return helpers.Element.prototype._parseTags.call(
-    { parseTags: true, screen: Screen.global }, text);
+    { parseTags: true, screen: screen || helpers.Screen.global }, text);
 };
 
 helpers.generateTags = function(style, text) {
@@ -150,6 +150,13 @@ helpers.dropUnicode = function(text) {
     .replace(unicode.chars.surrogate, '?');
 };
 
+helpers.__defineGetter__('Screen', function() {
+  if (!helpers._screen) {
+    helpers._screen = require('./widgets/screen');
+  }
+  return helpers._screen;
+});
+
 helpers.__defineGetter__('Element', function() {
   if (!helpers._element) {
     helpers._element = require('./widgets/element');