--- a/devtools/client/responsive.html/app.js
+++ b/devtools/client/responsive.html/app.js
@@ -29,16 +29,17 @@ const GlobalToolbar = createFactory(requ
 const Viewports = createFactory(require("./components/viewports"));
 const Types = require("./types");
 
 let App = createClass({
   displayName: "App",
 
   propTypes: {
     devices: PropTypes.shape(Types.devices).isRequired,
+    dispatch: PropTypes.func.isRequired,
     displayPixelRatio: PropTypes.number.isRequired,
     location: Types.location.isRequired,
     networkThrottling: PropTypes.shape(Types.networkThrottling).isRequired,
     screenshot: PropTypes.shape(Types.screenshot).isRequired,
     touchSimulation: PropTypes.shape(Types.touchSimulation).isRequired,
     viewports: PropTypes.arrayOf(PropTypes.shape(Types.viewport)).isRequired,
   },