diff --git a/src/ShuttleGui.cpp b/src/ShuttleGui.cpp
index 896527e92..3aaa4bcd9 100644
--- a/src/ShuttleGui.cpp
+++ b/src/ShuttleGui.cpp
@@ -2381,7 +2381,7 @@ std::unique_ptr<wxSizer> CreateStdButtonSizer(wxWindow *parent, long buttons, wx
    return std::unique_ptr<wxSizer>{ s.release() };
 }
 
-void ShuttleGui::AddStandardButtons(long buttons, wxButton *extra)
+void ShuttleGui::AddStandardButtons(long buttons, wxWindow *extra)
 {
    if( mShuttleMode != eIsCreating )
       return;
diff --git a/src/ShuttleGui.h b/src/ShuttleGui.h
index f74d48bcf..054238e8d 100644
--- a/src/ShuttleGui.h
+++ b/src/ShuttleGui.h
@@ -697,7 +697,7 @@ public:
    // The first of these buttons, if any, that is included will be default:
    // Apply, Yes, OK
    void AddStandardButtons(
-      long buttons = eOkButton | eCancelButton, wxButton *extra = NULL );
+      long buttons = eOkButton | eCancelButton, wxWindow *extra = NULL );
 
    wxSizerItem * AddSpace( int width, int height );
    wxSizerItem * AddSpace( int size ) { return AddSpace( size, size ); };