diff --git a/libcurl_http_fetcher.cc b/libcurl_http_fetcher.cc
index abc4389..e1e93cb 100644
--- a/libcurl_http_fetcher.cc
+++ b/libcurl_http_fetcher.cc
@@ -217,6 +217,7 @@
   no_network_retry_count_ = 0;
   http_response_code_ = 0;
   terminate_requested_ = false;
+  sent_byte_ = false;
   ResumeTransfer(url_);
   CurlPerformOnce();
 }