diff --git a/src/generic/wizard.cpp b/src/generic/wizard.cpp
index 83ad8ffb49..fa33339481 100644
--- a/src/generic/wizard.cpp
+++ b/src/generic/wizard.cpp
@@ -448,7 +448,7 @@ wxSize wxWizard::GetPageSize() const
     return wxSize(m_width, m_height);
 }
 
-void wxWizard::OnCancel(wxCommandEvent& WXUNUSED(event))
+void wxWizard::OnCancel(wxCommandEvent& WXUNUSED(eventUnused))
 {
     // this function probably can never be called when we don't have an active
     // page, but a small extra check won't hurt