diff --git a/download_action.h b/download_action.h
index 08035f0..d0ac175 100644
--- a/download_action.h
+++ b/download_action.h
@@ -86,6 +86,7 @@
   // HttpFetcherDelegate methods (see http_fetcher.h)
   virtual void ReceivedBytes(HttpFetcher *fetcher,
                              const char* bytes, int length);
+  virtual void SeekToOffset(off_t offset);
   virtual void TransferComplete(HttpFetcher *fetcher, bool successful);
 
   DownloadActionDelegate* delegate() const { return delegate_; }