diff --git a/winsup/cygwin/pinfo.cc b/winsup/cygwin/pinfo.cc
index 1ce680943..9b74442d0 100644
--- a/winsup/cygwin/pinfo.cc
+++ b/winsup/cygwin/pinfo.cc
@@ -502,7 +502,7 @@ _pinfo::set_ctty (fhandler_termios *fh, int flags)
       if (!tc.getpgid () && pgid == pid)
 	tc.setpgid (pgid);
     }
-  debug_printf ("cygheap->ctty now %p, archetype %p", cygheap->ctty, fh->archetype);
+  debug_printf ("cygheap->ctty now %p, archetype %p", cygheap->ctty, fh ? fh->archetype : NULL);
   return ctty > 0;
 }