diff --git a/actionpack/lib/action_controller/mime_responds.rb b/actionpack/lib/action_controller/mime_responds.rb
index 76fcae5f514c5b44810bcd47a2d1bf293beaf605..55cb212a10957c5f46478946e58fbc36a30f181a 100644
--- a/actionpack/lib/action_controller/mime_responds.rb
+++ b/actionpack/lib/action_controller/mime_responds.rb
@@ -147,13 +147,9 @@ def any(*args, &block)
       def self.generate_method_for_mime(mime)
         sym = mime.is_a?(Symbol) ? mime : mime.to_sym
         const = sym.to_s.upcase
-        class_eval <<-RUBY
+        class_eval <<-RUBY, __FILE__, __LINE__ + 1
           def #{sym}(&block)                          # def html(&block)
-            if Mime::SET.include?(Mime::#{const})     #   if Mime::Set.include?(Mime::HTML)
-              custom(Mime::#{const}, &block)          #     custom(Mime::HTML, &block)
-            else                                      #   else
-              super                                   #     super
-            end                                       #   end
+            custom(Mime::#{const}, &block)            #   custom(Mime::HTML, &block)
           end                                         # end
         RUBY
       end