1 files changed, 3 insertions, 1 deletions
diff --git a/src/corelib/io/qiodevice_p.h b/src/corelib/io/qiodevice_p.h
index 1bb569532b..f2fd0ca069 100644
--- a/src/corelib/io/qiodevice_p.h
+++ b/src/corelib/io/qiodevice_p.h
@@ -64,7 +64,7 @@
 QT_BEGIN_NAMESPACE
 
 #ifndef QIODEVICE_BUFFERSIZE
-#define QIODEVICE_BUFFERSIZE Q_INT64_C(16384)
+#define QIODEVICE_BUFFERSIZE 16384
 #endif
 
 Q_CORE_EXPORT int qt_subtract_from_timeout(int timeout, int elapsed);
@@ -125,6 +125,8 @@ public:
     int writeChannelCount;
     int currentReadChannel;
     int currentWriteChannel;
+    int readBufferChunkSize;
+    int writeBufferChunkSize;
     qint64 transactionPos;
     bool transactionStarted;
     bool baseReadLineDataCalled;