diff --git a/src/corelib/tools/qcryptographichash.cpp b/src/corelib/tools/qcryptographichash.cpp
index c1a4220ec1..0e57154c57 100644
--- a/src/corelib/tools/qcryptographichash.cpp
+++ b/src/corelib/tools/qcryptographichash.cpp
@@ -991,7 +991,7 @@ public:
     QByteArray result;
     QBasicMutex finalizeMutex;
     QCryptographicHash messageHash;
-    QCryptographicHash::Algorithm method;
+    const QCryptographicHash::Algorithm method;
     bool messageHashInited;
 
     void initMessageHash();