diff --git a/contrib/src/xml/xh_unkwn.cpp b/contrib/src/xml/xh_unkwn.cpp
index e71cc914fc..73fcde27e5 100644
--- a/contrib/src/xml/xh_unkwn.cpp
+++ b/contrib/src/xml/xh_unkwn.cpp
@@ -57,6 +57,7 @@ void wxUnknownControlContainer::AddChild(wxWindowBase *child)
     
     SetBackgroundColour(m_bg);
     child->SetName(m_controlName);
+    child->SetId(XMLID(m_controlName));
     m_controlAdded = TRUE;
     
     wxSizer *sizer = new wxBoxSizer(wxHORIZONTAL);
@@ -77,7 +78,7 @@ wxObject *wxUnknownWidgetXmlHandler::DoCreateResource()
 { 
     wxPanel *panel = 
         new wxUnknownControlContainer(m_parentAsWindow,
-                                      GetName(), GetID(),
+                                      GetName(), -1,
                                       GetPosition(), GetSize());
     SetupWindow(panel);
     return panel;