diff --git a/src/mmw/js/shim/backbone.marionette.js b/src/mmw/js/shim/backbone.marionette.js
index b63529838..f7126536b 100644
--- a/src/mmw/js/shim/backbone.marionette.js
+++ b/src/mmw/js/shim/backbone.marionette.js
@@ -10,4 +10,9 @@ Backbone.Marionette.Renderer.render = function(template, data) {
     return template(data);
 };
 
+// Expose Backbone and Marionette for the Marionette Inspector
+if (window.__agent) {
+  window.__agent.start(Backbone, Marionette);
+}
+
 module.exports = Marionette;