diff --git a/mercurial/bundlerepo.py b/mercurial/bundlerepo.py
--- a/mercurial/bundlerepo.py
+++ b/mercurial/bundlerepo.py
@@ -61,7 +61,7 @@ class bundlerevlog(revlog.revlog):
             if self.version == revlog.REVLOGV0:
                 e = (start, size, None, link, p1, p2, node)
             else:
-                e = (self.offset_type(start, 0), size, -1, None, link,
+                e = (revlog.offset_type(start, 0), size, -1, None, link,
                      self.rev(p1), self.rev(p2), node)
             self.basemap[n] = prev
             self.index.append(e)