1 files changed, 5 insertions, 0 deletions
diff --git a/actionpack/lib/action_controller/metal/strong_parameters.rb b/actionpack/lib/action_controller/metal/strong_parameters.rb
index b326695ce2..fea04d98e0 100644
--- a/actionpack/lib/action_controller/metal/strong_parameters.rb
+++ b/actionpack/lib/action_controller/metal/strong_parameters.rb
@@ -783,6 +783,11 @@ module ActionController
           end
         end
       end
+
+      def initialize_copy(source)
+        super
+        @parameters = source.instance_variable_get(:@parameters).dup
+      end
   end
 
   # == Strong \Parameters