diff --git a/doc/00 Guides/0 Overview.md b/doc/00 Guides/0 Overview.md
index 70b1bcdd39..6328d4dab2 100644
--- a/doc/00 Guides/0 Overview.md	
+++ b/doc/00 Guides/0 Overview.md	
@@ -141,7 +141,7 @@ var App = React.createClass({
 // Finally we render a `Router` component with some `Route`s, it'll do all
 // the fancy routing stuff for us.
 React.render((
-  <Router history={new HashHistory()}>
+  <Router history={new HashHistory}>
     <Route path="/" component={App}>
       <Route path="about" component={About}/>
       <Route path="inbox" component={Inbox}/>
@@ -162,7 +162,7 @@ var routes = {
   ]
 };
 
-React.render(<Router history={new HashHistory()} children={routes}/>, document.body);
+React.render(<Router history={new HashHistory} children={routes}/>, document.body);
 ```
 
 Adding more UI
@@ -191,7 +191,7 @@ var Inbox = React.createClass({
 });
 
 React.render((
-  <Router history={new HashHistory()}>
+  <Router history={new HashHistory}>
     <Route component={App}>
       <Route path="about" component={About}/>
       <Route path="inbox" component={Inbox}>
diff --git a/examples/async-data/app.js b/examples/async-data/app.js
index bcb15a65b2..5a0d88f7b0 100644
--- a/examples/async-data/app.js
+++ b/examples/async-data/app.js
@@ -106,7 +106,7 @@ var Index = React.createClass({
 });
 
 React.render((
-  <Router history={new HashHistory()} createElement={AsyncProps.createElement}>
+  <Router history={new HashHistory} createElement={AsyncProps.createElement}>
     <Route component={AsyncProps} renderInitialLoad={() => <Spinner/> }>
       <Route component={App}>
         <Route path="/" component={Index}/>
diff --git a/examples/huge-apps/app.js b/examples/huge-apps/app.js
index 0e028a3a3e..7b9b0cbfc7 100644
--- a/examples/huge-apps/app.js
+++ b/examples/huge-apps/app.js
@@ -28,7 +28,7 @@ var rootRoute = {
 React.render((
   <Router
     routes={rootRoute}
-    history={new HashHistory()}
+    history={new HashHistory}
     createElement={AsyncProps.createElement}
   />
 ), document.getElementById('example'));