diff --git a/include/wx/msw/private.h b/include/wx/msw/private.h
index 23da42791b..309f4376de 100644
--- a/include/wx/msw/private.h
+++ b/include/wx/msw/private.h
@@ -541,8 +541,13 @@ public:
 class AutoHBITMAP : private AutoGDIObject
 {
 public:
+    AutoHBITMAP()
+        : AutoGDIObject() { }
+
     AutoHBITMAP(HBITMAP hbmp) : AutoGDIObject(hbmp) { }
 
+    void Init(HBITMAP hbmp) { InitGdiobj(hbmp); }
+
     operator HBITMAP() const { return (HBITMAP)GetObject(); }
 };