diff --git a/include/wx/osx/core/private.h b/include/wx/osx/core/private.h
index fb28fd6e72..9961aaab05 100644
--- a/include/wx/osx/core/private.h
+++ b/include/wx/osx/core/private.h
@@ -302,7 +302,7 @@ public :
     virtual void        CaptureMouse() = 0;
     virtual void        ReleaseMouse() = 0;
     
-    virtual void        SetDropTarget( wxDropTarget *dropTarget ) {}
+    virtual void        SetDropTarget( wxDropTarget * WXUNUSED(dropTarget) ) {}
 
     virtual wxInt32     GetValue() const = 0;
     virtual void        SetValue( wxInt32 v ) = 0;