diff --git a/actionpack/lib/action_controller/metal/data_streaming.rb b/actionpack/lib/action_controller/metal/data_streaming.rb
index 773f15f58d..374645c9ce 100644
--- a/actionpack/lib/action_controller/metal/data_streaming.rb
+++ b/actionpack/lib/action_controller/metal/data_streaming.rb
@@ -125,7 +125,7 @@ module ActionController #:nodoc:
       #
       # See +send_file+ for more information on HTTP Content-* headers and caching.
       def send_data(data, options = {}) #:doc:
-        send_file_headers! options.dup
+        send_file_headers! options
         render options.slice(:status, :content_type).merge(:text => data)
       end