diff --git a/src/corelib/serialization/qtextstream.cpp b/src/corelib/serialization/qtextstream.cpp
index e9d650b3e2a..78eeb359067 100644
--- a/src/corelib/serialization/qtextstream.cpp
+++ b/src/corelib/serialization/qtextstream.cpp
@@ -249,6 +249,11 @@ QT_BEGIN_NAMESPACE
 using namespace Qt::StringLiterals;
 using namespace QtMiscUtils;
 
+#ifndef QT_NO_QOBJECT
+QDeviceClosedNotifier::~QDeviceClosedNotifier()
+    = default;
+#endif
+
 //-------------------------------------------------------------------
 
 /*!
diff --git a/src/corelib/serialization/qtextstream_p.h b/src/corelib/serialization/qtextstream_p.h
index db7bb7ba0dd..2f526710778 100644
--- a/src/corelib/serialization/qtextstream_p.h
+++ b/src/corelib/serialization/qtextstream_p.h
@@ -31,6 +31,7 @@ class QDeviceClosedNotifier : public QObject
 public:
     inline QDeviceClosedNotifier()
     { }
+    ~QDeviceClosedNotifier() override;
 
     inline void setupDevice(QTextStream *stream, QIODevice *device)
     {