diff --git a/addons/mail/static/src/components/attachment_viewer/attachment_viewer.js b/addons/mail/static/src/components/attachment_viewer/attachment_viewer.js
index 3dc899c7913..1d8ec556e22 100644
--- a/addons/mail/static/src/components/attachment_viewer/attachment_viewer.js
+++ b/addons/mail/static/src/components/attachment_viewer/attachment_viewer.js
@@ -223,17 +223,6 @@ export class AttachmentViewer extends Component {
         this._stopDragging();
     }
 
-    /**
-     * Called when clicking on next icon.
-     *
-     * @private
-     * @param {MouseEvent} ev
-     */
-    _onClickNext(ev) {
-        ev.stopPropagation();
-        this.attachmentViewer.next();
-    }
-
     /**
      * Called when clicking on previous icon.
      *
diff --git a/addons/mail/static/src/components/attachment_viewer/attachment_viewer.xml b/addons/mail/static/src/components/attachment_viewer/attachment_viewer.xml
index 58ce027b95e..89164a16c6f 100644
--- a/addons/mail/static/src/components/attachment_viewer/attachment_viewer.xml
+++ b/addons/mail/static/src/components/attachment_viewer/attachment_viewer.xml
@@ -87,7 +87,7 @@
                     <div class="o_AttachmentViewer_buttonNavigation o_AttachmentViewer_buttonNavigationPrevious o_AttachmentViewer_buttonNavigationPreviousIcon btn btn-dark position-absolute top-0 bottom-0 start-0 align-items-center justify-content-center d-flex my-auto ms-3 rounded-circle" t-on-click="_onClickPrevious" title="Previous (Left-Arrow)" role="button">
                         <span class="fa fa-chevron-left" role="img"/>
                     </div>
-                    <div class="o_AttachmentViewer_buttonNavigation o_AttachmentViewer_buttonNavigationNext o_AttachmentViewer_buttonNavigationNextIcon btn btn-dark position-absolute top-0 bottom-0 end-0 align-items-center justify-content-center d-flex my-auto me-3 rounded-circle" t-on-click="_onClickNext" title="Next (Right-Arrow)" role="button">
+                    <div class="o_AttachmentViewer_buttonNavigation o_AttachmentViewer_buttonNavigationNext o_AttachmentViewer_buttonNavigationNextIcon btn btn-dark position-absolute top-0 bottom-0 end-0 align-items-center justify-content-center d-flex my-auto me-3 rounded-circle" t-on-click="attachmentViewer.onClickNext" title="Next (Right-Arrow)" role="button">
                         <span class="fa fa-chevron-right" role="img"/>
                     </div>
                 </t>
diff --git a/addons/mail/static/src/models/attachment_viewer.js b/addons/mail/static/src/models/attachment_viewer.js
index 9c96a2f01d4..3208b83b5c8 100644
--- a/addons/mail/static/src/models/attachment_viewer.js
+++ b/addons/mail/static/src/models/attachment_viewer.js
@@ -82,6 +82,15 @@ registerModel({
             }
             ev.stopPropagation();
         },
+        /**
+         * Called when clicking on next icon.
+         *
+         * @param {MouseEvent} ev
+         */
+        onClickNext(ev) {
+            ev.stopPropagation();
+            this.next();
+        },
         /**
          * Called when clicking on embed video player. Stop propagation to prevent
          * closing the dialog.