diff --git a/src/corelib/thread/qthread_p.h b/src/corelib/thread/qthread_p.h
index 9aa0b3ea22a..7e32bcf7cd7 100644
--- a/src/corelib/thread/qthread_p.h
+++ b/src/corelib/thread/qthread_p.h
@@ -170,7 +170,7 @@ public:
     ~QDaemonThread();
 };
 
-class QThreadPrivate : public QObjectPrivate
+class Q_AUTOTEST_EXPORT QThreadPrivate : public QObjectPrivate
 {
     Q_DECLARE_PUBLIC(QThread)