diff --git a/lib/active_model/serializer/adapter/simple_adapter.rb b/lib/active_model/serializer/adapter/simple_adapter.rb
index 02b244ae..da397896 100644
--- a/lib/active_model/serializer/adapter/simple_adapter.rb
+++ b/lib/active_model/serializer/adapter/simple_adapter.rb
@@ -2,10 +2,14 @@ module ActiveModel
   class Serializer
     class Adapter
       class SimpleAdapter < Adapter
-        def to_json(options={})
+        def serializable_hash(options = {})
           serializer.attributes.each_with_object({}) do |(attr, value), h|
             h[attr] = value
-          end.to_json # FIXME: why does passing options here cause {}?
+          end
+        end
+
+        def to_json(options={})
+          serializable_hash(options).to_json
         end
       end
     end
diff --git a/test/adapter/simple_adapter_test.rb b/test/adapter/simple_adapter_test.rb
index e0374026..5805184f 100644
--- a/test/adapter/simple_adapter_test.rb
+++ b/test/adapter/simple_adapter_test.rb
@@ -11,6 +11,10 @@ module ActiveModel
           @adapter = SimpleAdapter.new(@profile_serializer)
         end
 
+        def test_serializable_hash
+          assert_equal({name: 'Name 1', description: 'Description 1'}, @adapter.serializable_hash)
+        end
+
         def test_simple_adapter
           assert_equal('{"name":"Name 1","description":"Description 1"}',
                        @adapter.to_json)