diff --git a/include/wx/dfb/private/overlay.h b/include/wx/dfb/private/overlay.h
index 675ff67b3e..2006f661ad 100644
--- a/include/wx/dfb/private/overlay.h
+++ b/include/wx/dfb/private/overlay.h
@@ -17,7 +17,7 @@
 wxDFB_DECLARE_INTERFACE(IDirectFBSurface);
 
 class WXDLLIMPEXP_FWD_CORE wxWindow;
-class WXDLLIMPEXP_FWD_CORE wxwindowDC;
+class WXDLLIMPEXP_FWD_CORE wxWindowDC;
 
 class wxOverlayImpl
 {
diff --git a/include/wx/window.h b/include/wx/window.h
index f0db87e135..2f2bc37174 100644
--- a/include/wx/window.h
+++ b/include/wx/window.h
@@ -71,9 +71,7 @@ class WXDLLIMPEXP_FWD_CORE wxControl;
 class WXDLLIMPEXP_FWD_CORE wxCursor;
 class WXDLLIMPEXP_FWD_CORE wxDC;
 class WXDLLIMPEXP_FWD_CORE wxDropTarget;
-class WXDLLIMPEXP_FWD_CORE wxItemResource;
 class WXDLLIMPEXP_FWD_CORE wxLayoutConstraints;
-class WXDLLIMPEXP_FWD_CORE wxResourceTable;
 class WXDLLIMPEXP_FWD_CORE wxSizer;
 class WXDLLIMPEXP_FWD_CORE wxToolTip;
 class WXDLLIMPEXP_FWD_CORE wxWindowBase;