diff --git a/src/plugins/platforms/windows/qwindowswindow.cpp b/src/plugins/platforms/windows/qwindowswindow.cpp
index ee9bf99..06e0750 100644
--- a/src/plugins/platforms/windows/qwindowswindow.cpp
+++ b/src/plugins/platforms/windows/qwindowswindow.cpp
@@ -366,7 +366,7 @@ struct WindowCreationData
         topLevel(false), popup(false), dialog(false), desktop(false),
         tool(false), embedded(false), hasAlpha(false) {}
 
-    void fromWindow(const QWindow *w, const Qt::WindowFlags flags, unsigned creationFlags = 0);
+    void fromWindow(QWindow *w, const Qt::WindowFlags flags, unsigned creationFlags = 0);
     inline WindowData create(const QWindow *w, const WindowData &data, QString title) const;
     inline void applyWindowFlags(HWND hwnd) const;
     void initialize(HWND h, bool frameChange, qreal opacityLevel) const;
@@ -417,7 +417,7 @@ static inline void fixTopLevelWindowFlags(Qt::WindowFlags &flags)
     }
 }
 
-void WindowCreationData::fromWindow(const QWindow *w, const Qt::WindowFlags flagsIn,
+void WindowCreationData::fromWindow(QWindow *w, const Qt::WindowFlags flagsIn,
                                     unsigned creationFlags)
 {
     isGL = w->surfaceType() == QWindow::OpenGLSurface;
@@ -532,6 +532,8 @@ void WindowCreationData::fromWindow(const QWindow *w, const Qt::WindowFlags flag
                 exStyle |= WS_EX_LAYERED | WS_EX_TRANSPARENT;
 #endif
         }
+        if (QGuiApplicationPrivate::instance()->isWindowBlocked(w))
+            style |= WS_DISABLED;
     }
 }
 
@@ -1033,7 +1035,7 @@ QWindow *QWindowsWindow::topLevelOf(QWindow *w)
 }
 
 QWindowsWindowData
-    QWindowsWindowData::create(const QWindow *w,
+    QWindowsWindowData::create(QWindow *w,
                                        const QWindowsWindowData &parameters,
                                        const QString &title)
 {
diff --git a/src/plugins/platforms/windows/qwindowswindow.h b/src/plugins/platforms/windows/qwindowswindow.h
index cb437b7..4ae54ee 100644
--- a/src/plugins/platforms/windows/qwindowswindow.h
+++ b/src/plugins/platforms/windows/qwindowswindow.h
@@ -122,7 +122,7 @@ struct QWindowsWindowData
     HWND hwnd;
     bool embedded;
 
-    static QWindowsWindowData create(const QWindow *w,
+    static QWindowsWindowData create(QWindow *w,
                                      const QWindowsWindowData &parameters,
                                      const QString &title);
 };