diff --git a/requests/adapters.py b/requests/adapters.py
index bc01e336..a4b02842 100644
--- a/requests/adapters.py
+++ b/requests/adapters.py
@@ -411,7 +411,7 @@ class HTTPAdapter(BaseAdapter):
 
         self.cert_verify(conn, request.url, verify, cert)
         url = self.request_url(request, proxies)
-        self.add_headers(request)
+        self.add_headers(request, stream=stream, timeout=timeout, verify=verify, cert=cert, proxies=proxies)
 
         chunked = not (request.body is None or 'Content-Length' in request.headers)