1 files changed, 2 insertions, 0 deletions
diff --git a/src/corelib/tools/qcryptographichash.h b/src/corelib/tools/qcryptographichash.h
index b40e8cc25b..15ebd22418 100644
--- a/src/corelib/tools/qcryptographichash.h
+++ b/src/corelib/tools/qcryptographichash.h
@@ -51,6 +51,7 @@ QT_BEGIN_NAMESPACE
 QT_MODULE(Core)
 
 class QCryptographicHashPrivate;
+class QIODevice;
 
 class Q_CORE_EXPORT QCryptographicHash
 {
@@ -68,6 +69,7 @@ public:
 
     void addData(const char *data, int length);
     void addData(const QByteArray &data);
+    bool addData(QIODevice* device);
 
     QByteArray result() const;