diff --git a/lib/web/mage/adminhtml/wysiwyg/tiny_mce/setup.js b/lib/web/mage/adminhtml/wysiwyg/tiny_mce/setup.js
index 4ba8627ff7df3..23f24bfcd1a9b 100755
--- a/lib/web/mage/adminhtml/wysiwyg/tiny_mce/setup.js
+++ b/lib/web/mage/adminhtml/wysiwyg/tiny_mce/setup.js
@@ -238,16 +238,20 @@ define([
          * @param {Object} o
          */
         openFileBrowser: function (o) {
-            var targetElementID =  tinymce.activeEditor.getElement().getAttribute('id');
-            var originId = this.id;
+            var targetElementID =  tinyMCE.activeEditor.getElement().getAttribute('id'),
+                originId = this.id,
+                typeTitle,
+                storeId,
+                frameDialog,
+                wUrl;
+
             this.initialize(targetElementID, this.config);
 
-            var typeTitle,
-                storeId = this.config['store_id'] !== null ? this.config['store_id'] : 0,
-                frameDialog = jQuery(o.win.frameElement).parents('[role="dialog"]'),
-                wUrl = this.config['files_browser_window_url'] +
-                    'target_element_id/' + this.id + '/' +
-                    'store/' + storeId + '/';
+            storeId = this.config['store_id'] !== null ? this.config['store_id'] : 0;
+            frameDialog = jQuery(o.win.frameElement).parents('[role="dialog"]');
+            wUrl = this.config['files_browser_window_url'] +
+                'target_element_id/' + this.id + '/' +
+                'store/' + storeId + '/';
 
             this.mediaBrowserOpener = o.win;
             this.mediaBrowserTargetElementId = o.field;