diff --git a/apps/documenteditor/main/app/controller/Viewport.js b/apps/documenteditor/main/app/controller/Viewport.js
index 0c889b7c0..43b07abda 100644
--- a/apps/documenteditor/main/app/controller/Viewport.js
+++ b/apps/documenteditor/main/app/controller/Viewport.js
@@ -49,7 +49,7 @@ define([
 ], function (Viewport) {
     'use strict';
 
-    DE.Controllers.Viewport = Backbone.Controller.extend({
+    DE.Controllers.Viewport = Backbone.Controller.extend(_.assign({
         // Specifying a Viewport model
         models: [],
 
@@ -366,4 +366,5 @@ define([
 
         textFitPage: 'Fit to Page',
         textFitWidth: 'Fit to Width'
+    }, DE.Controllers.Viewport));
 });
diff --git a/apps/presentationeditor/main/app/controller/Viewport.js b/apps/presentationeditor/main/app/controller/Viewport.js
index 6ae3dbbe9..053110bc2 100644
--- a/apps/presentationeditor/main/app/controller/Viewport.js
+++ b/apps/presentationeditor/main/app/controller/Viewport.js
@@ -49,7 +49,7 @@ define([
 ], function (Viewport) {
     'use strict';
 
-    PE.Controllers.Viewport = Backbone.Controller.extend({
+    PE.Controllers.Viewport = Backbone.Controller.extend(_.assign({
         // Specifying a Viewport model
         models: [],
 
@@ -403,4 +403,5 @@ define([
 
         textFitPage: 'Fit to Page',
         textFitWidth: 'Fit to Width'
+    }, PE.Controllers.Viewport));
 });
diff --git a/apps/spreadsheeteditor/main/app/controller/Viewport.js b/apps/spreadsheeteditor/main/app/controller/Viewport.js
index ce517338f..fc3a06846 100644
--- a/apps/spreadsheeteditor/main/app/controller/Viewport.js
+++ b/apps/spreadsheeteditor/main/app/controller/Viewport.js
@@ -48,7 +48,7 @@ define([
 ], function (Viewport) {
     'use strict';
 
-    SSE.Controllers.Viewport = Backbone.Controller.extend({
+    SSE.Controllers.Viewport = Backbone.Controller.extend(_.assign({
         // Specifying a Viewport model
         models: [],
 
@@ -413,4 +413,5 @@ define([
         textHideHeadings: 'Hide Headings',
         textHideGridlines: 'Hide Gridlines',
         textFreezePanes: 'Freeze Panes'
+    }, SSE.Controllers.Viewport));
 });