Index: django/contrib/comments/models.py
===================================================================
--- django/contrib/comments/models.py	(revision 16443)
+++ django/contrib/comments/models.py	(working copy)
@@ -57,7 +57,8 @@
 
     # Metadata about the comment
     submit_date = models.DateTimeField(_('date/time submitted'), default=None)
-    ip_address  = models.IPAddressField(_('IP address'), blank=True, null=True)
+    ip_address  = models.GenericIPAddressField(_('IP address'),
+                    unpack_ipv4=True, blank=True, null=True)
     is_public   = models.BooleanField(_('is public'), default=True,
                     help_text=_('Uncheck this box to make the comment effectively ' \
                                 'disappear from the site.'))