--- a/src/corelib/io/qfile_p.h	Fri Apr 16 15:50:13 2010 +0300
+++ b/src/corelib/io/qfile_p.h	Mon May 03 13:17:34 2010 +0300
@@ -84,6 +84,8 @@
     void setError(QFile::FileError err, const QString &errorString);
     void setError(QFile::FileError err, int errNum);
 
+    mutable qint64 cachedSize;
+
 private:
     static QFile::EncoderFn encoder;
     static QFile::DecoderFn decoder;