diff --git a/lib/em-http/middleware/oauth.rb b/lib/em-http/middleware/oauth.rb
index d1cbeec0..4c922147 100644
--- a/lib/em-http/middleware/oauth.rb
+++ b/lib/em-http/middleware/oauth.rb
@@ -12,7 +12,7 @@ def initialize(opts = {})
 
       def request(client, head, body)
         @consumer.sign!(client, @access_token)
-        head.merge!(client.options[:head])
+        head.merge!(client.req.headers)
 
         [head,body]
       end