1 files changed, 1 insertions, 1 deletions
diff --git a/src/corelib/io/qwindowspipereader_p.h b/src/corelib/io/qwindowspipereader_p.h
index 2c32eeb9ce..c8a66d9511 100644
--- a/src/corelib/io/qwindowspipereader_p.h
+++ b/src/corelib/io/qwindowspipereader_p.h
@@ -96,7 +96,7 @@ private:
     QWinOverlappedIoNotifier *dataReadNotifier;
     qint64 readBufferMaxSize;
     QRingBuffer readBuffer;
-    int actualReadBufferSize;
+    qint64 actualReadBufferSize;
     bool stopped;
     bool readSequenceStarted;
     bool pipeBroken;