diff --git a/youtube_dl/downloader/http.py b/youtube_dl/downloader/http.py
index 6b4122f8d..b60a750ca 100644
--- a/youtube_dl/downloader/http.py
+++ b/youtube_dl/downloader/http.py
@@ -45,6 +45,7 @@ class HttpFD(FileDownloader):
 
         is_test = self.params.get('test', False)
         chunk_size = self._TEST_FILE_SIZE if is_test else (
+            info_dict.get('downloader_options', {}).get('http_chunk_size') or
             self.params.get('http_chunk_size') or 0)
 
         ctx.open_mode = 'wb'
diff --git a/youtube_dl/extractor/common.py b/youtube_dl/extractor/common.py
index deafb4850..988fc15ff 100644
--- a/youtube_dl/extractor/common.py
+++ b/youtube_dl/extractor/common.py
@@ -174,6 +174,8 @@ class InfoExtractor(object):
                                  width : height ratio as float.
                     * no_resume  The server does not support resuming the
                                  (HTTP or RTMP) download. Boolean.
+                    * downloader_options  A dictionary of downloader options as
+                                 described in FileDownloader
 
     url:            Final video URL.
     ext:            Video filename extension.