--- ray/src/rt/raypcalls.c	2007/09/12 03:57:00	2.15
+++ ray/src/rt/raypcalls.c	2007/09/15 02:47:56	2.16
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char	RCSid[] = "$Id: raypcalls.c,v 2.15 2007/09/12 03:57:00 greg Exp $";
+static const char	RCSid[] = "$Id: raypcalls.c,v 2.16 2007/09/15 02:47:56 greg Exp $";
 #endif
 /*
  *  raypcalls.c - interface for parallel rendering using Radiance
@@ -308,6 +308,9 @@ ray_presult(		/* check for a completed ray */
 		n = ray_pnprocs - ray_pnidle;
 	if (n <= 0)			/* return if nothing to await */
 		return(0);
+	if (!poll && ray_pnprocs == 1)	/* one process -> skip select() */
+		FD_SET(r_proc[0].fd_recv, &readset);
+
 getready:				/* any children waiting for us? */
 	for (pn = ray_pnprocs; pn--; )
 		if (FD_ISSET(r_proc[pn].fd_recv, &readset) ||