diff --git a/addons/mail/static/src/js/composer.js b/addons/mail/static/src/js/composer.js
index 6a83c39d900..a235eb04d46 100644
--- a/addons/mail/static/src/js/composer.js
+++ b/addons/mail/static/src/js/composer.js
@@ -659,6 +659,7 @@ var BasicComposer = Widget.extend(chat_mixin, {
                 }
             });
             this.set('attachment_ids', attachments);
+            this.$('input.o_input_file').val('');
         }
     },
     do_check_attachment_upload: function () {