this always sets :public to false, so just do that

1 files changed, 1 insertions, 1 deletions

diff --git a/actionpack/lib/action_controller/metal/data_streaming.rb b/actionpack/lib/action_controller/metal/data_streaming.rb
index e6d7f958bb..1586893ace 100644
--- a/actionpack/lib/action_controller/metal/data_streaming.rb
+++ b/actionpack/lib/action_controller/metal/data_streaming.rb
@@ -169,7 +169,7 @@ module ActionController #:nodoc:
         # after it displays the "open/save" dialog, which means that if you
         # hit "open" the file isn't there anymore when the application that
         # is called for handling the download is run, so let's workaround that
-        response.cache_control[:public] ||= false
+        response.cache_control[:public] = false
       end
   end
 end