diff --git a/app/controllers/errors_controller.rb b/app/controllers/errors_controller.rb
index 5b6fcbcce10..a77c402c80f 100644
--- a/app/controllers/errors_controller.rb
+++ b/app/controllers/errors_controller.rb
@@ -10,9 +10,10 @@ class ErrorsController < ApplicationController
     render_404
   end
 
+  # this may be called on CSRF validation failure
   def unacceptable
     render file: "#{Rails.public_path.join('422.html')}",
-           status: :not_acceptable,
+           status: :unprocessable_entity,
            layout: false
   end