diff --git a/ChangeLog b/ChangeLog
index 31adaec2..0920659c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Sep 28 13:07:37 CEST 2004 Daniel Veillard <daniel@veillard.com
+
+	* python/libxml.py: applied patch from Malcolm Tredinnick fixing
+	  python exception hierarchy #139824
+
 Sun Sep 26 16:40:24 CEST 2004 Daniel Veillard <daniel@veillard.com>
 
 	* valid.c TODO: applied patch from Malcolm Tredinnick fixing errata
diff --git a/python/libxml.py b/python/libxml.py
index 1036bd90..588e8624 100644
--- a/python/libxml.py
+++ b/python/libxml.py
@@ -1,28 +1,31 @@
 import libxml2mod
 import types
 
+# The root of all libxml2 errors.
+class libxmlError(Exception): pass
+
 #
 # Errors raised by the wrappers when some tree handling failed.
 #
-class treeError:
+class treeError(libxmlError):
     def __init__(self, msg):
         self.msg = msg
     def __str__(self):
         return self.msg
 
-class parserError:
+class parserError(libxmlError):
     def __init__(self, msg):
         self.msg = msg
     def __str__(self):
         return self.msg
 
-class uriError:
+class uriError(libxmlError):
     def __init__(self, msg):
         self.msg = msg
     def __str__(self):
         return self.msg
 
-class xpathError:
+class xpathError(libxmlError):
     def __init__(self, msg):
         self.msg = msg
     def __str__(self):