diff --git a/src/msw/control.cpp b/src/msw/control.cpp
index 9b38d3d935..3b60836933 100644
--- a/src/msw/control.cpp
+++ b/src/msw/control.cpp
@@ -228,7 +228,7 @@ wxControl::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 
 // another version for the "composite", i.e. non simple controls
 /* static */ wxVisualAttributes
-wxControl::GetCompositeControlsDefaultAttributes(wxWindowVariant variant)
+wxControl::GetCompositeControlsDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 {
     wxVisualAttributes attrs;
     attrs.font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);