diff --git a/hgext/convert/subversion.py b/hgext/convert/subversion.py
--- a/hgext/convert/subversion.py
+++ b/hgext/convert/subversion.py
@@ -93,9 +93,9 @@ def debugsvnlog(ui, **opts):
     get_log_child(sys.stdout, *args)
 
 # SVN conversion code stolen from bzr-svn and tailor
-class convert_svn(converter_source):
+class svn_source(converter_source):
     def __init__(self, ui, url, rev=None):
-        super(convert_svn, self).__init__(ui, url, rev=rev)
+        super(svn_source, self).__init__(ui, url, rev=rev)
 
         try:
             SubversionException