diff --git a/src/window.cpp b/src/window.cpp
index 681efa9fcf..f75d0621cb 100644
--- a/src/window.cpp
+++ b/src/window.cpp
@@ -72,7 +72,6 @@ Window::Window()
     , ready_for_painting(false)
     , m_internalId(QUuid::createUuid())
     , m_client()
-    , is_shape(false)
     , m_clientMachine(new ClientMachine(this))
     , m_wmClientLeader(XCB_WINDOW_NONE)
     , m_skipCloseAnimation(false)
@@ -175,11 +174,7 @@ QDebug operator<<(QDebug debug, const Window *window)
 
 void Window::detectShape(xcb_window_t id)
 {
-    const bool wasShape = is_shape;
     is_shape = Xcb::Extensions::self()->hasShape(id);
-    if (wasShape != is_shape) {
-        Q_EMIT shapedChanged();
-    }
 }
 
 QRectF Window::visibleGeometry() const
@@ -421,7 +416,7 @@ QVector<QRectF> Window::shapeRegion() const
 
     const QRectF bufferGeometry = this->bufferGeometry();
 
-    if (shape()) {
+    if (is_shape) {
         auto cookie = xcb_shape_get_rectangles_unchecked(kwinApp()->x11Connection(), frameId(), XCB_SHAPE_SK_BOUNDING);
         UniqueCPtr<xcb_shape_get_rectangles_reply_t> reply(xcb_shape_get_rectangles_reply(kwinApp()->x11Connection(), cookie, nullptr));
         if (reply) {
diff --git a/src/window.h b/src/window.h
index 5fa6ba1516..77fbec583b 100644
--- a/src/window.h
+++ b/src/window.h
@@ -243,11 +243,6 @@ class KWIN_EXPORT Window : public QObject
      */
     Q_PROPERTY(bool deleted READ isDeleted CONSTANT)
 
-    /**
-     * Whether the window has an own shape
-     */
-    Q_PROPERTY(bool shaped READ shape NOTIFY shapedChanged)
-
     /**
      * Whether the window does not want to be animated on window close.
      * There are legit reasons for this like a screenshot application which does not want it's
@@ -691,7 +686,6 @@ public:
 
     bool readyForPainting() const; // true if the window has been already painted its contents
     xcb_visualid_t visual() const;
-    bool shape() const;
     QRegion inputShape() const;
     void setOpacity(qreal opacity);
     qreal opacity() const;
@@ -1395,12 +1389,6 @@ Q_SIGNALS:
     void closed();
     void windowShown(KWin::Window *window);
     void windowHidden(KWin::Window *window);
-    /**
-     * Signal emitted when the window's shape state changed. That is if it did not have a shape
-     * and received one or if the shape was withdrawn. Think of Chromium enabling/disabling KWin's
-     * decoration.
-     */
-    void shapedChanged();
     /**
      * Emitted whenever the Window's screen changes. This can happen either in consequence to
      * a screen being removed/added or if the Window's geometry changes.
@@ -1828,6 +1816,7 @@ protected:
     void cleanTabBox();
 
     QStringList m_activityList;
+    bool is_shape = false;
 
 private Q_SLOTS:
     void shadeHover();
@@ -1840,7 +1829,6 @@ private:
     int m_refCount = 1;
     QUuid m_internalId;
     Xcb::Window m_client;
-    bool is_shape;
     std::unique_ptr<EffectWindowImpl> m_effectWindow;
     std::unique_ptr<WindowItem> m_windowItem;
     std::unique_ptr<Shadow> m_shadow;
@@ -2159,11 +2147,6 @@ inline bool Window::isInternal() const
     return false;
 }
 
-inline bool Window::shape() const
-{
-    return is_shape;
-}
-
 inline int Window::depth() const
 {
     return bit_depth;
diff --git a/src/x11window.cpp b/src/x11window.cpp
index cbd749b57c..2e3ee39b51 100644
--- a/src/x11window.cpp
+++ b/src/x11window.cpp
@@ -1243,7 +1243,7 @@ void X11Window::maybeDestroyX11DecorationRenderer()
 
 void X11Window::detectNoBorder()
 {
-    if (shape()) {
+    if (is_shape) {
         noborder = true;
         app_noborder = true;
         return;
@@ -1384,7 +1384,7 @@ void X11Window::checkNoBorder()
 
 void X11Window::updateShape()
 {
-    if (shape()) {
+    if (is_shape) {
         // Workaround for #19644 - Shaped windows shouldn't have decoration
         if (!app_noborder) {
             // Only when shape is detected for the first time, still let the user to override