diff --git a/addons/mail/static/src/models/file_uploader.js b/addons/mail/static/src/models/file_uploader.js
index 3ea8cbd7fcd..66a7bbcd615 100644
--- a/addons/mail/static/src/models/file_uploader.js
+++ b/addons/mail/static/src/models/file_uploader.js
@@ -38,13 +38,12 @@ Model({
             if (!this.exists()) {
                 return;
             }
-            if (this.fileInput && this.fileInput.el) {
-                this.fileInput.el.value = '';
-            }
             if (this.chatterOwner && !this.chatterOwner.hasAttachmentBox) {
                 this.chatterOwner.openAttachmentBox();
             }
             this.messaging.messagingBus.trigger('o-file-uploader-upload', { files });
+            // clear at the end because side-effect of emptying `files`
+            this.fileInput.value = '';
         },
         /**
          * @private