diff --git a/activesupport/lib/active_support/core_ext/object/json.rb b/activesupport/lib/active_support/core_ext/object/json.rb
index d92af19137..dcfbe8b40f 100644
--- a/activesupport/lib/active_support/core_ext/object/json.rb
+++ b/activesupport/lib/active_support/core_ext/object/json.rb
@@ -45,7 +45,7 @@ module ActiveSupport
   end
 end
 
-[Object, Array, FalseClass, Float, Hash, Integer, NilClass, String, TrueClass, Enumerable].reverse_each do |klass|
+[Enumerable, Object, Array, FalseClass, Float, Hash, Integer, NilClass, String, TrueClass].reverse_each do |klass|
   klass.prepend(ActiveSupport::ToJsonWithActiveSupportEncoder)
 end