--- Tty.xs	2023-12-29 04:53:07.000000000 +1100
+++ Tty.xs_modified	2024-06-23 20:25:51.411610800 +1000
@@ -257,6 +257,7 @@
     {
 	mysig_t old_signal;
 	old_signal = mysignal(SIGCHLD, SIG_DFL);
+#undef HAVE_GRANTPT
 #if defined(HAVE_GRANTPT)
 #if PTY_DEBUG
 	if (print_debug)