diff --git a/src/msw/listbox.cpp b/src/msw/listbox.cpp
index 39b23695e7..6c82458ece 100644
--- a/src/msw/listbox.cpp
+++ b/src/msw/listbox.cpp
@@ -161,7 +161,7 @@ bool wxListBox::Create(wxWindow *parent,
                        const wxSize& size,
                        int n, const wxString choices[],
                        long style,
-                       const wxValidator& wxVALIDATOR_PARAM(validator),
+                       const wxValidator& validator,
                        const wxString& name)
 {
     m_noItems = 0;