diff --git a/src/widgets/widgets/qdockwidget.cpp b/src/widgets/widgets/qdockwidget.cpp
index da8882d13c8..7792bea118a 100644
--- a/src/widgets/widgets/qdockwidget.cpp
+++ b/src/widgets/widgets/qdockwidget.cpp
@@ -1836,27 +1836,6 @@ QWidget *QDockWidget::titleBarWidget() const
     return layout->widgetForRole(QDockWidgetLayout::TitleBar);
 }
 
-#ifndef QT_NO_DEBUG_STREAM
-QDebug operator<<(QDebug dbg, const QDockWidget *dockWidget)
-{
-    QDebugStateSaver saver(dbg);
-    dbg.nospace();
-    return dockWidget ? dbg << *dockWidget : dbg << "QDockWidget(0x0)";
-}
-
-QDebug operator<<(QDebug dbg, const QDockWidget &dockWidget)
-{
-    QDebugStateSaver saver(dbg);
-    dbg.nospace();
-    dbg << "QDockWidget(" << static_cast<const void *>(&dockWidget);
-    dbg << "->(ObjectName=" << dockWidget.objectName();
-    dbg << "; floating=" << dockWidget.isFloating();
-    dbg << "; features=" << dockWidget.features();
-    dbg << ";))";
-    return dbg;
-}
-#endif // QT_NO_DEBUG_STREAM
-
 QT_END_NAMESPACE
 
 #include "qdockwidget.moc"
diff --git a/src/widgets/widgets/qdockwidget.h b/src/widgets/widgets/qdockwidget.h
index 211b703e034..92b7663acd6 100644
--- a/src/widgets/widgets/qdockwidget.h
+++ b/src/widgets/widgets/qdockwidget.h
@@ -64,11 +64,6 @@ public:
     inline bool isAreaAllowed(Qt::DockWidgetArea area) const
     { return (allowedAreas() & area) == area; }
 
-#ifndef QT_NO_DEBUG_STREAM
-    friend Q_WIDGETS_EXPORT QDebug operator<<(QDebug dbg, const QDockWidget &dockWidget);
-    friend Q_WIDGETS_EXPORT QDebug operator<<(QDebug dbg, const QDockWidget *dockWidget);
-#endif
-
 #ifndef QT_NO_ACTION
     QAction *toggleViewAction() const;
 #endif