diff --git a/include/wx/generic/spinctlg.h b/include/wx/generic/spinctlg.h
index f535a8dd3f..d1b84a7328 100644
--- a/include/wx/generic/spinctlg.h
+++ b/include/wx/generic/spinctlg.h
@@ -101,6 +101,9 @@ private:
     // the subcontrols
     wxTextCtrl *m_text;
     wxSpinButton *m_btn;
+    
+private:
+    DECLARE_DYNAMIC_CLASS(wxSpinCtrl)
 };
 
 #else // !wxUSE_SPINBTN