diff --git a/src/widgets/kernel/qapplication.cpp b/src/widgets/kernel/qapplication.cpp
index 5dd24d1052e..5276268f087 100644
--- a/src/widgets/kernel/qapplication.cpp
+++ b/src/widgets/kernel/qapplication.cpp
@@ -1479,24 +1479,6 @@ QString QApplicationPrivate::desktopStyleKey()
     return QString();
 }
 
-#if QT_VERSION < 0x060000 // remove these forwarders in Qt 6
-/*!
-    \property QApplication::windowIcon
-    \brief the default window icon
-
-    \sa QWidget::setWindowIcon(), {Setting the Application Icon}
-*/
-QIcon QApplication::windowIcon()
-{
-    return QGuiApplication::windowIcon();
-}
-
-void QApplication::setWindowIcon(const QIcon &icon)
-{
-    QGuiApplication::setWindowIcon(icon);
-}
-#endif
-
 void QApplicationPrivate::notifyWindowIconChanged()
 {
     QEvent ev(QEvent::ApplicationWindowIconChange);
diff --git a/src/widgets/kernel/qapplication.h b/src/widgets/kernel/qapplication.h
index f7de8242905..d8b14ae6077 100644
--- a/src/widgets/kernel/qapplication.h
+++ b/src/widgets/kernel/qapplication.h
@@ -71,7 +71,6 @@ class QApplicationPrivate;
 class Q_WIDGETS_EXPORT QApplication : public QGuiApplication
 {
     Q_OBJECT
-    Q_PROPERTY(QIcon windowIcon READ windowIcon WRITE setWindowIcon)
     Q_PROPERTY(int cursorFlashTime READ cursorFlashTime WRITE setCursorFlashTime)
     Q_PROPERTY(int doubleClickInterval  READ doubleClickInterval WRITE setDoubleClickInterval)
     Q_PROPERTY(int keyboardInputInterval READ keyboardInputInterval WRITE setKeyboardInputInterval)
@@ -110,11 +109,6 @@ public:
     static void setFont(const QFont &, const char* className = nullptr);
     static QFontMetrics fontMetrics();
 
-#if QT_VERSION < 0x060000 // remove these forwarders in Qt 6
-    static void setWindowIcon(const QIcon &icon);
-    static QIcon windowIcon();
-#endif
-
     static QWidgetList allWidgets();
     static QWidgetList topLevelWidgets();