2 files changed, 3 insertions, 1 deletions
diff --git a/src/network/socket/qlocalsocket.cpp b/src/network/socket/qlocalsocket.cpp
index a42b70546c..001f585fa7 100644
--- a/src/network/socket/qlocalsocket.cpp
+++ b/src/network/socket/qlocalsocket.cpp
@@ -396,6 +396,8 @@ QLocalSocket::QLocalSocket(QObject * parent)
     : QIODevice(*new QLocalSocketPrivate, parent)
 {
     Q_D(QLocalSocket);
+
+    d->readBufferChunkSize = 0; // force QIODevice unbuffered mode
     d->init();
 }
 
diff --git a/src/network/socket/qlocalsocket_unix.cpp b/src/network/socket/qlocalsocket_unix.cpp
index d10ab36821..8f5da60553 100644
--- a/src/network/socket/qlocalsocket_unix.cpp
+++ b/src/network/socket/qlocalsocket_unix.cpp
@@ -357,7 +357,7 @@ void QLocalSocketPrivate::_q_connectToSocket()
     fullServerName = connectingPathName;
     if (unixSocket.setSocketDescriptor(connectingSocket,
         QAbstractSocket::ConnectedState, connectingOpenMode)) {
-        q->QIODevice::open(connectingOpenMode | QIODevice::Unbuffered);
+        q->QIODevice::open(connectingOpenMode);
         q->emit connected();
     } else {
         QString function = QLatin1String("QLocalSocket::connectToServer");