diff --git a/include/wx/msw/spinctrl.h b/include/wx/msw/spinctrl.h
index 528ff7dcbf..b58f818c74 100644
--- a/include/wx/msw/spinctrl.h
+++ b/include/wx/msw/spinctrl.h
@@ -102,6 +102,7 @@ protected:
     // Handle processing of special keys
     void OnChar(wxKeyEvent& event);
     void OnSetFocus(wxFocusEvent& event);
+    void OnKillFocus(wxFocusEvent& event);
 
     // the data for the "buddy" text ctrl
     WXHWND     m_hwndBuddy;
diff --git a/include/wx/vlbox.h b/include/wx/vlbox.h
index a512d05108..bc61c0d542 100644
--- a/include/wx/vlbox.h
+++ b/include/wx/vlbox.h
@@ -13,6 +13,7 @@
 #define _WX_VLBOX_H_
 
 #include "wx/vscroll.h"         // base class
+#include "wx/bitmap.h"
 
 class WXDLLEXPORT wxSelectionStore;
 
@@ -286,6 +287,8 @@ private:
     // the selection bg colour
     wxColour m_colBgSel;
 
+    // double buffer
+    wxBitmap* m_doubleBuffer;
 
     DECLARE_EVENT_TABLE()
     DECLARE_NO_COPY_CLASS(wxVListBox)