diff -u -r1.76 vtkPythonUtil.cxx
--- VTK/Common/vtkPythonUtil.cxx        4 Aug 2005 16:19:14 -0000       1.76
+++ VTK/Common/vtkPythonUtil.cxx        18 Dec 2006 20:16:46 -0000
@@ -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);