diff --git a/src/msw/slider95.cpp b/src/msw/slider95.cpp
index 1c723f2f21..3853c60447 100644
--- a/src/msw/slider95.cpp
+++ b/src/msw/slider95.cpp
@@ -121,7 +121,7 @@ bool wxSlider95::Create(wxWindow *parent, wxWindowID id,
            int value, int minValue, int maxValue,
            const wxPoint& pos,
            const wxSize& size, long style,
-           const wxValidator& wxVALIDATOR_PARAM(validator),
+           const wxValidator& validator,
            const wxString& name)
 {
     // default is no border