diff --git a/uhr.js b/uhr.js
index 743e73c..dde0858 100644
--- a/uhr.js
+++ b/uhr.js
@@ -292,7 +292,7 @@ UhrRenderer.prototype.render = function(uhr, beforeshow) {
 	if (this.layout.version !== undefined) {
 		switch (this.layout.version) {
 			case 2:
-				var delegate = new UhrRendererV2Delegate(this.layout);
+				var delegate = new _UhrRendererV2Delegate(this.layout);
 				letters = delegate.parse();
 				break;
 			default:
@@ -320,7 +320,7 @@ UhrRenderer.prototype.render = function(uhr, beforeshow) {
 	});
 };
 
-function UhrRendererV2Delegate(layout) {
+function _UhrRendererV2Delegate(layout) {
 	this.layout = layout;
 	this._parseArrayOrObject = function(letters, styleClass, input) {
 		if (Array.isArray(input)) {
@@ -354,7 +354,7 @@ function UhrRendererV2Delegate(layout) {
 		}
 	}
 }
-UhrRendererV2Delegate.prototype.parse = function() {
+_UhrRendererV2Delegate.prototype.parse = function() {
 	var letters = [];
 	for (var i = 0; i < this.layout.letters.length; i++) {
 		var line = [];