diff --git a/ChangeLog b/ChangeLog
index e40a6f64..cc12ea00 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Dec 14 16:52:34 CET 2006 Daniel Veillard <daniel@veillard.com>
+
+	* python/generator.py python/libxml.py: apparently id() sometimes
+	  generate negative values and %X outputs -XXXX :-(
+
 Mon Dec  4 10:30:25 CET 2006 Daniel Veillard <daniel@veillard.com>
 
 	* parser.c include/libxml/tree.h: patch from Michael Day on standalone
diff --git a/python/generator.py b/python/generator.py
index f116f8ab..a38a23c5 100755
--- a/python/generator.py
+++ b/python/generator.py
@@ -1055,7 +1055,7 @@ def buildWrappers():
 		   classes_ancestor[classname] == "xmlNode":
 		    classes.write("    def __repr__(self):\n")
 		    format = "<%s (%%s) object at 0x%%x>" % (classname)
-		    classes.write("        return \"%s\" %% (self.name, long(id (self)))\n\n" % (
+		    classes.write("        return \"%s\" %% (self.name, long(pos_id (self)))\n\n" % (
 				  format))
 	    else:
 		txt.write("Class %s()\n" % (classname))
diff --git a/python/libxml.py b/python/libxml.py
index 4c9fe92f..988a1662 100644
--- a/python/libxml.py
+++ b/python/libxml.py
@@ -1,9 +1,19 @@
 import libxml2mod
 import types
+import sys
 
 # The root of all libxml2 errors.
 class libxmlError(Exception): pass
 
+#
+# id() is sometimes negative ...
+#
+def pos_id(o):
+    i = id(o)
+    if (i < 0):
+        return (sys.maxint - i)
+    return i
+
 #
 # Errors raised by the wrappers when some tree handling failed.
 #