diff --git a/lib/libc_r/uthread/uthread_select.c b/lib/libc_r/uthread/uthread_select.c
index 0211883cc1b..d6202db0140 100644
--- a/lib/libc_r/uthread/uthread_select.c
+++ b/lib/libc_r/uthread/uthread_select.c
@@ -145,7 +145,7 @@ select(int numfds, fd_set * readfds, fd_set * writefds,
 		if (FD_ISSET(i, &write_locks))
 			_FD_UNLOCK(i, FD_WRITE);
 
-	if (ret > 0) {
+	if (ret >= 0) {
 		if (readfds != NULL) {
 			for (i = 0; i < numfds; i++) {
 				if (FD_ISSET(i, readfds) &&
diff --git a/lib/libkse/thread/thr_select.c b/lib/libkse/thread/thr_select.c
index 0211883cc1b..d6202db0140 100644
--- a/lib/libkse/thread/thr_select.c
+++ b/lib/libkse/thread/thr_select.c
@@ -145,7 +145,7 @@ select(int numfds, fd_set * readfds, fd_set * writefds,
 		if (FD_ISSET(i, &write_locks))
 			_FD_UNLOCK(i, FD_WRITE);
 
-	if (ret > 0) {
+	if (ret >= 0) {
 		if (readfds != NULL) {
 			for (i = 0; i < numfds; i++) {
 				if (FD_ISSET(i, readfds) &&
diff --git a/lib/libpthread/thread/thr_select.c b/lib/libpthread/thread/thr_select.c
index 0211883cc1b..d6202db0140 100644
--- a/lib/libpthread/thread/thr_select.c
+++ b/lib/libpthread/thread/thr_select.c
@@ -145,7 +145,7 @@ select(int numfds, fd_set * readfds, fd_set * writefds,
 		if (FD_ISSET(i, &write_locks))
 			_FD_UNLOCK(i, FD_WRITE);
 
-	if (ret > 0) {
+	if (ret >= 0) {
 		if (readfds != NULL) {
 			for (i = 0; i < numfds; i++) {
 				if (FD_ISSET(i, readfds) &&