diff --git a/viewer/js/viewer/_ControllerBase.js b/viewer/js/viewer/_ControllerBase.js
index 20958b0d8..4ae03c5f7 100644
--- a/viewer/js/viewer/_ControllerBase.js
+++ b/viewer/js/viewer/_ControllerBase.js
@@ -8,6 +8,15 @@ define([
 ) {
     return declare(null, {
 
+        /**
+         * Mixes in this apps properties with the passed arguments
+         * @param  {Object} args The properties to mixin
+         * @return {undefined}
+         */
+        constructor: function (args) {
+            lang.mixin(this, args);
+        },
+
         /**
          * A method run before anything else, can be inherited by mixins to
          * load and process the config sync or async