diff --git gtk/MessageLogWindow.cc gtk/MessageLogWindow.cc
index 05ca819..6abdab7 100644
--- gtk/MessageLogWindow.cc
+++ gtk/MessageLogWindow.cc
@@ -227,12 +227,12 @@ void MessageLogWindow::Impl::doSave(Gtk::Window& parent, Glib::ustring const& fi
             fmt::format(
                 _("Couldn't save '{path}': {error} ({error_code})"),
                 fmt::arg("path", filename),
-                fmt::arg("error", e.code().message()),
-                fmt::arg("error_code", e.code().value())),
+                fmt::arg("error", e.what()),
+                fmt::arg("error_code", e.what())),
             false,
             TR_GTK_MESSAGE_TYPE(ERROR),
             TR_GTK_BUTTONS_TYPE(CLOSE));
-        w->set_secondary_text(e.code().message());
+        w->set_secondary_text(e.what());
         w->signal_response().connect([w](int /*response*/) mutable { w.reset(); });
         w->show();
     }