diff --git a/actionpack/lib/action_dispatch/journey/formatter.rb b/actionpack/lib/action_dispatch/journey/formatter.rb
index e8d3c35d37..cf755bfbeb 100644
--- a/actionpack/lib/action_dispatch/journey/formatter.rb
+++ b/actionpack/lib/action_dispatch/journey/formatter.rb
@@ -37,18 +37,16 @@ module ActionDispatch
       private
 
         def extract_parameterized_parts(route, options, recall, parameterize = nil)
-          data = recall.merge(options)
+          parameterized_parts = recall.merge(options)
 
           keys_to_keep = route.parts.reverse.drop_while { |part|
             !options.key?(part) || (options[part] || recall[part]).nil?
           } | route.required_parts
 
-          (data.keys - keys_to_keep).each do |bad_key|
-            data.delete(bad_key)
+          (parameterized_parts.keys - keys_to_keep).each do |bad_key|
+            parameterized_parts.delete(bad_key)
           end
 
-          parameterized_parts = data.dup
-
           if parameterize
             parameterized_parts.each do |k, v|
               parameterized_parts[k] = parameterize.call(k, v)