diff --git a/src/dat/controllers/Controller.js b/src/dat/controllers/Controller.js
index 7c39f61..6f555d3 100644
--- a/src/dat/controllers/Controller.js
+++ b/src/dat/controllers/Controller.js
@@ -54,7 +54,7 @@ class Controller {
     this.__onFinishChange = undefined;
 
     /**
-    * Wether to force update a display, even when active.
+    * Whether to force update a display, even when input is active.
     * @type boolean
     */
     this.forceUpdateDisplay = false;
diff --git a/src/dat/gui/GUI.js b/src/dat/gui/GUI.js
index 0d9059c..b8d1571 100644
--- a/src/dat/gui/GUI.js
+++ b/src/dat/gui/GUI.js
@@ -972,6 +972,7 @@ function augmentController(gui, li, controller) {
 
     /**
      * Sets controller to listen for changes on its underlying object.
+     * @param {boolean} forceUpdateDisplay Whether to force update a display, even when input is active.
      * @return {Controller}
      */
     listen: function(forceUpdateDisplay) {