--- rltty.c	2018-09-19 11:19:26.000000000 -0400
+++ rltty.c.new	2020-11-16 03:16:51.311626266 -0500
@@ -606,6 +606,10 @@
   _rl_block_sigint ();
 
   tty = rl_instream ? fileno (rl_instream) : fileno (stdin);
+  if (!rl_outstream)
+    {
+      rl_outstream = stdout;
+    }
 
   if (get_tty_settings (tty, &tio) < 0)
     {