diff -Naur VTK/Common/vtkPythonUtil.cxx VTK-new/Common/vtkPythonUtil.cxx
--- VTK/Common/vtkPythonUtil.cxx	2005-08-04 12:19:14.000000000 -0400
+++ VTK-new/Common/vtkPythonUtil.cxx	2006-09-23 11:16:06.000000000 -0400
@@ -768,7 +768,7 @@
     }
   if (strcmp(name, "__doc__") == 0)
     {
-    char *doc = t->tp_doc;
+    const char *doc = t->tp_doc;
     if (doc != NULL)
       {
       return PyString_FromString(doc);