--- a/hgext/convert/filemap.py	Mon Jun 01 17:12:41 2009 +0200
+++ b/hgext/convert/filemap.py	Mon Jun 01 17:12:42 2009 +0200
@@ -354,3 +354,6 @@
 
     def hasnativeorder(self):
         return self.base.hasnativeorder()
+
+    def lookuprev(self, rev):
+        return self.base.lookuprev(rev)