lib/rainbows/server_token.rb in rainbows-2.1.0 vs lib/rainbows/server_token.rb in rainbows-3.0.0

@@ -28,10 +28,10 @@
     super
   end
 
   def call(env)
     status, headers, body = app.call(env)
-    headers = Rack::Utils::HeaderHash.new(headers)
+    headers = Rack::Utils::HeaderHash.new(headers) unless Hash === headers
     headers[SERVER] = token
     [ status, headers, body ]
   end
   # :startdoc:
 end