diff --git a/youtube_dl/downloader/http.py b/youtube_dl/downloader/http.py
index b2e82cfde..f796ee113 100644
--- a/youtube_dl/downloader/http.py
+++ b/youtube_dl/downloader/http.py
@@ -4,6 +4,7 @@ import errno
 import os
 import socket
 import time
+import re
 
 from .common import FileDownloader
 from ..compat import (