diff --git a/lib/pyrrent2http/pyrrent2http.py b/lib/pyrrent2http/pyrrent2http.py
index 0abe6a9..7ad2254 100644
--- a/lib/pyrrent2http/pyrrent2http.py
+++ b/lib/pyrrent2http/pyrrent2http.py
@@ -177,7 +177,7 @@ class TorrentFile(object):
     def SetPriority(self, priority):
         self.tfs.setPriority(self.index, priority)
     def readOffset(self):
-        return self.filePtr.seek(0, io.SEEK_CUR)
+        return self.filePtr.seek(0, os.SEEK_CUR)
     def havePiece(self, piece):
         return self.tfs.handle.have_piece(piece)
     def pieceFromOffset(self, offset):