1 files changed, 4 insertions, 0 deletions
diff --git a/actionpack/lib/abstract_controller/rendering.rb b/actionpack/lib/abstract_controller/rendering.rb
index 8ba2b25552..280af50a44 100644
--- a/actionpack/lib/abstract_controller/rendering.rb
+++ b/actionpack/lib/abstract_controller/rendering.rb
@@ -28,6 +28,7 @@ module AbstractController
       else
         _set_rendered_content_type rendered_format
       end
+      _set_vary_header
       self.response_body = rendered_body
     end
 
@@ -109,6 +110,9 @@ module AbstractController
     def _set_html_content_type # :nodoc:
     end
 
+    def _set_vary_header # :nodoc:
+    end
+
     def _set_rendered_content_type(format) # :nodoc:
     end