diff --git a/cde/lib/tt/slib/mp_rpc_server.C b/cde/lib/tt/slib/mp_rpc_server.C
index 8292c86f6..0bd690f11 100644
--- a/cde/lib/tt/slib/mp_rpc_server.C
+++ b/cde/lib/tt/slib/mp_rpc_server.C
@@ -244,8 +244,7 @@ init(void (*service_fn)(struct svc_req *, SVCXPRT *))
 	(void)endnetconfig(handlep);
 #endif				/* OPT_TLI */
 	// now figure out what fd the rpc package is using
-	int maxfds = _tt_global->maxfds();
-	for (int i=0; i < maxfds; i++) {
+	for (int i=0; i < FD_SETSIZE; i++) {
 		if (FD_ISSET(i, &svc_fdset)) {
 			_rpc_fd = i;
 		}