diff --git a/src/generic/filedlgg.cpp b/src/generic/filedlgg.cpp
index 83c51c893e..903c2423cc 100644
--- a/src/generic/filedlgg.cpp
+++ b/src/generic/filedlgg.cpp
@@ -704,7 +704,7 @@ void wxFileCtrl::OnListDeleteItem( wxListEvent &event )
     FreeItemData(event.m_item);
 }
 
-void wxFileCtrl::OnListDeleteAllItems( wxListEvent &event )
+void wxFileCtrl::OnListDeleteAllItems( wxListEvent & WXUNUSED(event) )
 {
     FreeAllItemsData();
 }