diff --git a/examples/corelib/ipc/localfortuneclient/client.cpp b/examples/corelib/ipc/localfortuneclient/client.cpp
index 8336728f790..b71409560b5 100644
--- a/examples/corelib/ipc/localfortuneclient/client.cpp
+++ b/examples/corelib/ipc/localfortuneclient/client.cpp
@@ -63,20 +63,14 @@ void Client::requestNewFortune()
 
 void Client::readFortune()
 {
-    if (blockSize == 0) {
-        // Relies on the fact that QDataStream serializes a quint32 into
-        // sizeof(quint32) bytes
-        if (socket->bytesAvailable() < (int)sizeof(quint32))
-            return;
-        in >> blockSize;
-    }
-
-    if (socket->bytesAvailable() < blockSize || in.atEnd())
-        return;
+    in.startTransaction();
 
     QString nextFortune;
     in >> nextFortune;
 
+    if (!in.commitTransaction())
+        return;
+
     if (nextFortune == currentFortune) {
         QTimer::singleShot(0, this, &Client::requestNewFortune);
         return;
diff --git a/examples/corelib/ipc/localfortuneserver/server.cpp b/examples/corelib/ipc/localfortuneserver/server.cpp
index 77322e03bdc..a602a57f72d 100644
--- a/examples/corelib/ipc/localfortuneserver/server.cpp
+++ b/examples/corelib/ipc/localfortuneserver/server.cpp
@@ -103,10 +103,9 @@ void Server::sendFortune()
 {
     QByteArray block;
     QDataStream out(&block, QIODevice::WriteOnly);
-    out.setVersion(QDataStream::Qt_6_0);
+    out.setVersion(QDataStream::Qt_6_5);
     const int fortuneIndex = QRandomGenerator::global()->bounded(0, fortunes.size());
     const QString &message = fortunes.at(fortuneIndex);
-    out << quint32(message.size());
     out << message;
 
     QLocalSocket *clientConnection = server->nextPendingConnection();