diff --git a/include/wx/strvararg.h b/include/wx/strvararg.h
index bd7d867b3c..e60392d2f7 100644
--- a/include/wx/strvararg.h
+++ b/include/wx/strvararg.h
@@ -195,7 +195,7 @@ private:
     const wxString * const m_str;
     const wxCStrData * const m_cstr;
 
-    DECLARE_NO_COPY_CLASS(wxFormatString)
+    DECLARE_NO_ASSIGN_CLASS(wxFormatString)
 };
 
 // these two helper classes are used to find wxFormatString argument among fixed