diff --git a/typo3/sysext/backend/Resources/Private/TypeScript/AjaxDataHandler.ts b/typo3/sysext/backend/Resources/Private/TypeScript/AjaxDataHandler.ts
index 9fea6d61fa65..5429e18499aa 100644
--- a/typo3/sysext/backend/Resources/Private/TypeScript/AjaxDataHandler.ts
+++ b/typo3/sysext/backend/Resources/Private/TypeScript/AjaxDataHandler.ts
@@ -12,6 +12,8 @@
  */
 
 import {SeverityEnum} from './Enum/Severity';
+import MessageInterface from './AjaxDataHandler/MessageInterface';
+import ResponseInterface from './AjaxDataHandler/ResponseInterface';
 import * as $ from 'jquery';
 import Icons = require('./Icons');
 import Modal = require('./Modal');
@@ -24,18 +26,6 @@ enum Identifiers {
   icon = '.t3js-icon'
 }
 
-interface Message {
-  title: string;
-  message: string;
-  severity: SeverityEnum;
-}
-
-interface Response {
-  redirect: string;
-  messages: Array<Message>;
-  hasErrors: boolean;
-}
-
 /**
  * Module: TYPO3/CMS/Backend/AjaxDataHandler
  * AjaxDataHandler - Javascript functions to work with AJAX and interacting with tce_db.php
@@ -63,7 +53,7 @@ class AjaxDataHandler {
    * @returns {JQueryPromise<any>}
    */
   public process(parameters: Object): JQueryPromise<any> {
-    return this._call(parameters).done((result: Response): void => {
+    return this._call(parameters).done((result: ResponseInterface): void => {
       if (result.hasErrors) {
         this.handleErrors(result);
       }
@@ -83,7 +73,7 @@ class AjaxDataHandler {
       this._showSpinnerIcon($iconElement);
 
       // make the AJAX call to toggle the visibility
-      this._call(params).done((result: Response): void => {
+      this._call(params).done((result: ResponseInterface): void => {
         // print messages on errors
         if (result.hasErrors) {
           this.handleErrors(result);
@@ -193,7 +183,7 @@ class AjaxDataHandler {
     this._showSpinnerIcon($iconElement);
 
     // make the AJAX call to toggle the visibility
-    this._call(params).done((result: Response): void => {
+    this._call(params).done((result: ResponseInterface): void => {
       // revert to the old class
       Icons.getIcon('actions-edit-delete', Icons.sizes.small).done((icon: string): void => {
         $iconElement = $anchorElement.find(Identifiers.icon);
@@ -237,8 +227,8 @@ class AjaxDataHandler {
    *
    * @param {Object} result
    */
-  private handleErrors(result: Response): void {
-    $.each(result.messages, (position: number, message: Message): void => {
+  private handleErrors(result: ResponseInterface): void {
+    $.each(result.messages, (position: number, message: MessageInterface): void => {
       Notification.error(message.title, message.message);
     });
   }
diff --git a/typo3/sysext/backend/Resources/Private/TypeScript/AjaxDataHandler/MessageInterface.ts b/typo3/sysext/backend/Resources/Private/TypeScript/AjaxDataHandler/MessageInterface.ts
new file mode 100644
index 000000000000..cdb70e3532fe
--- /dev/null
+++ b/typo3/sysext/backend/Resources/Private/TypeScript/AjaxDataHandler/MessageInterface.ts
@@ -0,0 +1,18 @@
+/*
+ * This file is part of the TYPO3 CMS project.
+ *
+ * It is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, either version 2
+ * of the License, or any later version.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ *
+ * The TYPO3 project - inspiring people to share!
+ */
+
+export default interface MessageInterface {
+  title: string;
+  message: string;
+  severity: number;
+}
diff --git a/typo3/sysext/backend/Resources/Private/TypeScript/AjaxDataHandler/ResponseInterface.ts b/typo3/sysext/backend/Resources/Private/TypeScript/AjaxDataHandler/ResponseInterface.ts
new file mode 100644
index 000000000000..e30dfc9686db
--- /dev/null
+++ b/typo3/sysext/backend/Resources/Private/TypeScript/AjaxDataHandler/ResponseInterface.ts
@@ -0,0 +1,20 @@
+/*
+ * This file is part of the TYPO3 CMS project.
+ *
+ * It is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, either version 2
+ * of the License, or any later version.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ *
+ * The TYPO3 project - inspiring people to share!
+ */
+
+import MessageInterface from './MessageInterface';
+
+export default interface ResponseInterface {
+  redirect: string;
+  messages: Array<MessageInterface>;
+  hasErrors: boolean;
+}
diff --git a/typo3/sysext/backend/Resources/Public/JavaScript/AjaxDataHandler/MessageInterface.js b/typo3/sysext/backend/Resources/Public/JavaScript/AjaxDataHandler/MessageInterface.js
new file mode 100644
index 000000000000..d580a287e270
--- /dev/null
+++ b/typo3/sysext/backend/Resources/Public/JavaScript/AjaxDataHandler/MessageInterface.js
@@ -0,0 +1,13 @@
+/*
+ * This file is part of the TYPO3 CMS project.
+ *
+ * It is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, either version 2
+ * of the License, or any later version.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ *
+ * The TYPO3 project - inspiring people to share!
+ */
+define(["require","exports"],function(e,r){"use strict";Object.defineProperty(r,"__esModule",{value:!0})});
\ No newline at end of file
diff --git a/typo3/sysext/backend/Resources/Public/JavaScript/AjaxDataHandler/ResponseInterface.js b/typo3/sysext/backend/Resources/Public/JavaScript/AjaxDataHandler/ResponseInterface.js
new file mode 100644
index 000000000000..d580a287e270
--- /dev/null
+++ b/typo3/sysext/backend/Resources/Public/JavaScript/AjaxDataHandler/ResponseInterface.js
@@ -0,0 +1,13 @@
+/*
+ * This file is part of the TYPO3 CMS project.
+ *
+ * It is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, either version 2
+ * of the License, or any later version.
+ *
+ * For the full copyright and license information, please read the
+ * LICENSE.txt file that was distributed with this source code.
+ *
+ * The TYPO3 project - inspiring people to share!
+ */
+define(["require","exports"],function(e,r){"use strict";Object.defineProperty(r,"__esModule",{value:!0})});
\ No newline at end of file