diff -Nrup a/strace.c b/strace.c
--- a/strace.c	2015-04-22 12:48:38.000000000 -0600
+++ b/strace.c	2015-04-22 14:43:41.639193569 -0600
@@ -1928,7 +1928,7 @@ collect_stopped_tcbs(void)
 	nextp = &found_tcps;
 	found_tcps = NULL;
 
-	while (nprocs != 0) {
+	while (1) {
 		int wait_errno;
 		int status;
 		unsigned event;
@@ -2398,7 +2398,7 @@ trace(void)
 	int rc;
 	struct tcb *tcbs;
 
-	while (nprocs != 0) {
+	while (1) {
 		if (interrupted)
 			return 0;
 		tcbs = collect_stopped_tcbs();