1 files changed, 1 insertions, 1 deletions
diff --git a/actionpack/lib/action_controller/vendor/rack-1.0/rack/handler/mongrel.rb b/actionpack/lib/action_controller/vendor/rack-1.0/rack/handler/mongrel.rb
index cd906862a5..178a1a8fe4 100644
--- a/actionpack/lib/action_controller/vendor/rack-1.0/rack/handler/mongrel.rb
+++ b/actionpack/lib/action_controller/vendor/rack-1.0/rack/handler/mongrel.rb
@@ -63,7 +63,7 @@ module Rack
           response.send_status(nil)
 
           headers.each { |k, vs|
-            vs.each { |v|
+            vs.split("\n").each { |v|
               response.header[k] = v
             }
           }