diff --git a/io/channel-command.c b/io/channel-command.c
index f53ce0f4f4a7b4680c29cce665543ef08f18c9f1..604514adfc58f49a30a2514ed32588a0b9b19b54 100644
--- a/io/channel-command.c
+++ b/io/channel-command.c
@@ -236,8 +236,7 @@ static ssize_t qio_channel_command_readv(QIOChannel *ioc,
  retry:
     ret = readv(cioc->readfd, iov, niov);
     if (ret < 0) {
-        if (errno == EAGAIN ||
-            errno == EWOULDBLOCK) {
+        if (errno == EAGAIN) {
             return QIO_CHANNEL_ERR_BLOCK;
         }
         if (errno == EINTR) {
@@ -265,8 +264,7 @@ static ssize_t qio_channel_command_writev(QIOChannel *ioc,
  retry:
     ret = writev(cioc->writefd, iov, niov);
     if (ret <= 0) {
-        if (errno == EAGAIN ||
-            errno == EWOULDBLOCK) {
+        if (errno == EAGAIN) {
             return QIO_CHANNEL_ERR_BLOCK;
         }
         if (errno == EINTR) {
diff --git a/io/channel-file.c b/io/channel-file.c
index 19a432562a971438e34bafaf894a221a20464fbc..f28e2b0a5caff96a294a8a1c78a0651628b7f888 100644
--- a/io/channel-file.c
+++ b/io/channel-file.c
@@ -96,8 +96,7 @@ static ssize_t qio_channel_file_readv(QIOChannel *ioc,
  retry:
     ret = readv(fioc->fd, iov, niov);
     if (ret < 0) {
-        if (errno == EAGAIN ||
-            errno == EWOULDBLOCK) {
+        if (errno == EAGAIN) {
             return QIO_CHANNEL_ERR_BLOCK;
         }
         if (errno == EINTR) {
@@ -125,8 +124,7 @@ static ssize_t qio_channel_file_writev(QIOChannel *ioc,
  retry:
     ret = writev(fioc->fd, iov, niov);
     if (ret <= 0) {
-        if (errno == EAGAIN ||
-            errno == EWOULDBLOCK) {
+        if (errno == EAGAIN) {
             return QIO_CHANNEL_ERR_BLOCK;
         }
         if (errno == EINTR) {
diff --git a/io/channel-socket.c b/io/channel-socket.c
index 9b5f2d8887ed3d0b49ef85ac22ef9082f75878ee..2387d97d7c7823088052f9ce0287d71979b69087 100644
--- a/io/channel-socket.c
+++ b/io/channel-socket.c
@@ -466,8 +466,7 @@ static ssize_t qio_channel_socket_readv(QIOChannel *ioc,
  retry:
     ret = recvmsg(sioc->fd, &msg, sflags);
     if (ret < 0) {
-        if (socket_error() == EAGAIN ||
-            socket_error() == EWOULDBLOCK) {
+        if (socket_error() == EAGAIN) {
             return QIO_CHANNEL_ERR_BLOCK;
         }
         if (socket_error() == EINTR) {
@@ -526,8 +525,7 @@ static ssize_t qio_channel_socket_writev(QIOChannel *ioc,
  retry:
     ret = sendmsg(sioc->fd, &msg, 0);
     if (ret <= 0) {
-        if (socket_error() == EAGAIN ||
-            socket_error() == EWOULDBLOCK) {
+        if (socket_error() == EAGAIN) {
             return QIO_CHANNEL_ERR_BLOCK;
         }
         if (socket_error() == EINTR) {