diff --git a/youtube_dl/downloader/hls.py b/youtube_dl/downloader/hls.py
index a62d2047b..9a83a73dd 100644
--- a/youtube_dl/downloader/hls.py
+++ b/youtube_dl/downloader/hls.py
@@ -30,7 +30,7 @@ class HlsFD(FileDownloader):
 
         args = [ffpp.executable, '-y']
 
-        if info_dict['http_headers']:
+        if info_dict['http_headers'] and re.match(r'^https?://', url):
             # Trailing \r\n after each HTTP header is important to prevent warning from ffmpeg/avconv:
             # [http @ 00000000003d2fa0] No trailing CRLF found in HTTP header.
             args += [