diff --git vcl/source/window/window.cxx vcl/source/window/window.cxx
index cc8973d..a0771a1 100644
--- vcl/source/window/window.cxx
+++ vcl/source/window/window.cxx
@@ -1395,7 +1395,7 @@ void Window::ImplSetReallyVisible()
     }
 }

-void Window::ImplAddDel( ImplDelData* pDel ) // TODO: make "const" when incompatibility ok
+void Window::ImplAddDel( ImplDelData* pDel ) const// TODO: make "const" when incompatibility ok
 {
     if ( IsDisposed() )
     {
@@ -1406,7 +1406,7 @@ void Window::ImplAddDel( ImplDelData* pDel ) // TODO: make "const" when incompat
     DBG_ASSERT( !pDel->mpWindow, "Window::ImplAddDel(): cannot add ImplDelData twice !" );
     if( !pDel->mpWindow )
     {
-        pDel->mpWindow = this;  // #112873# store ref to this window, so pDel can remove itself
+        pDel->mpWindow = const_cast<vcl::Window*>(this);  // #112873# store ref to this window, so pDel can remove itself
         pDel->mpNext = mpWindowImpl->mpFirstDel;
         mpWindowImpl->mpFirstDel = pDel;
     }