diff --git a/include/wx/gdiobj.h b/include/wx/gdiobj.h
index 77b4c532f2..da977d3939 100644
--- a/include/wx/gdiobj.h
+++ b/include/wx/gdiobj.h
@@ -20,7 +20,7 @@
 // the same native GDI object
 // ----------------------------------------------------------------------------
 
-class WXDLLIMPEXP_FWD_CORE wxGDIRefData : public wxObjectRefData
+class WXDLLIMPEXP_CORE wxGDIRefData : public wxObjectRefData
 {
 public:
     // override this in the derived classes to check if this data object is
diff --git a/include/wx/msw/glcanvas.h b/include/wx/msw/glcanvas.h
index dba1cba083..38e9db2aa0 100644
--- a/include/wx/msw/glcanvas.h
+++ b/include/wx/msw/glcanvas.h
@@ -141,8 +141,6 @@ protected:
     // HDC for this window, we keep it all the time
     HDC m_hDC;
 
-    void wxGLCanvas::DestroyWindowPFD(wxWindow *parent);
-
 private:
     DECLARE_EVENT_TABLE()
     DECLARE_CLASS(wxGLCanvas)