--- a/src/xfcetimer.c
+++ b/src/xfcetimer.c
@@ -175,6 +175,7 @@ static gboolean update_function (gpointe
                                     GTK_DIALOG_DESTROY_WITH_PARENT | GTK_DIALOG_MODAL,
                                     GTK_MESSAGE_WARNING,
                                     GTK_BUTTONS_CLOSE,
+                                    "%s",
                                     dialog_message);
 
     g_signal_connect_swapped (dialog, "response",