diff --git a/wxPython/src/_panel.i b/wxPython/src/_panel.i
index 76a7fb4d5f..b0bcc1ad56 100644
--- a/wxPython/src/_panel.i
+++ b/wxPython/src/_panel.i
@@ -37,7 +37,7 @@ public:
     %name(PrePanel)wxPanel();
 
     bool Create(wxWindow* parent,
-                const wxWindowID id,
+                const wxWindowID id=-1,
                 const wxPoint& pos = wxDefaultPosition,
                 const wxSize& size = wxDefaultSize,
                 long style = wxTAB_TRAVERSAL | wxNO_BORDER,