diff --git a/include/wx/treebase.h b/include/wx/treebase.h
index 92c7644412..d54fd49b30 100644
--- a/include/wx/treebase.h
+++ b/include/wx/treebase.h
@@ -265,11 +265,15 @@ private:
 //     descriptions below
 // ----------------------------------------------------------------------------
 
+class WXDLLEXPORT  wxTreeCtrlBase;
+
 class WXDLLEXPORT wxTreeEvent : public wxNotifyEvent
 {
 public:
-    wxTreeEvent(wxEventType commandType = wxEVT_NULL, int id = 0);
-    wxTreeEvent(const wxTreeEvent & event);
+    wxTreeEvent(wxEventType commandType,
+                wxTreeCtrlBase *tree,
+                const wxTreeItemId &item = wxTreeItemId());
+    wxTreeEvent(const wxTreeEvent& event);
 
     virtual wxEvent *Clone() const { return new wxTreeEvent(*this); }