diff --git a/addons/hr_expense/static/src/components/attachment_view.js b/addons/hr_expense/static/src/components/attachment_view.js
index cac1c86d888..91963766756 100644
--- a/addons/hr_expense/static/src/components/attachment_view.js
+++ b/addons/hr_expense/static/src/components/attachment_view.js
@@ -6,7 +6,7 @@ import { AttachmentView } from "@mail/core/common/attachment_view";
 patch(AttachmentView.prototype, {
     get displayName() {
         if (this.state.thread.model === 'hr.expense.sheet') {
-            return (this.state.thread.mainAttachment.res_name || this.state.thread.name) + ' - ' + this.state.thread.mainAttachment.filename;
+            return (this.state.thread.mainAttachment.res_name || this.state.thread.name);
         }
         return super.displayName;
     }