--- cyrus-imapd-2.0.14/master/master.c.wiget	Fri Jun 22 08:35:25 2001
+++ cyrus-imapd-2.0.14/master/master.c	Fri Jun 22 08:38:08 2001
@@ -1279,7 +1279,7 @@
 	    int y = Services[i].socket;
 	    int j;
 
-	    if (FD_ISSET(x, &rfds)) {
+	    if (x > 0 && FD_ISSET(x, &rfds)) {
 		r = read(x, &msg, sizeof(int));
 		if (r != sizeof(int)) {
 		    syslog(LOG_ERR, "got weird response from child: %x", i);
@@ -1299,7 +1299,7 @@
 	    }
 
 	    if (Services[i].ready_workers == 0 && 
-		FD_ISSET(y, &rfds)) {
+		y > 0 && FD_ISSET(y, &rfds)) {
 		/* huh, someone wants to talk to us */
 		spawn_service(&Services[i]);
 	    }