diff --git a/lib/active_model_serializers/model.rb b/lib/active_model_serializers/model.rb
index b9937cb5c..56e993341 100644
--- a/lib/active_model_serializers/model.rb
+++ b/lib/active_model_serializers/model.rb
@@ -30,6 +30,8 @@ def updated_at
     end
 
     def read_attribute_for_serialization(key)
+      return send(key) if respond_to?(key)
+
       if key == :id || key == 'id'
         attributes.fetch(key) { id }
       else
diff --git a/test/active_model_serializers/model_test.rb b/test/active_model_serializers/model_test.rb
index 7bfb2edf4..b748af973 100644
--- a/test/active_model_serializers/model_test.rb
+++ b/test/active_model_serializers/model_test.rb
@@ -4,7 +4,7 @@ module ActiveModelSerializers
   class ModelTest < ActiveSupport::TestCase
     include ActiveModel::Serializer::Lint::Tests
 
-    def setup
+    setup do
       @resource = ActiveModelSerializers::Model.new
     end
 
@@ -18,5 +18,46 @@ def test_initialization_with_string_keys
 
       assert_equal model_instance.read_attribute_for_serialization(:key), value
     end
+
+    def test_attributes_can_be_read_for_serialization
+      klass = Class.new(ActiveModelSerializers::Model) do
+        attr_accessor :one, :two, :three
+      end
+      original_attributes = { one: 1, two: 2, three: 3 }
+      instance = klass.new(original_attributes)
+
+      # Initial value
+      expected_attributes = { one: 1, two: 2, three: 3 }
+      assert_equal expected_attributes, instance.attributes
+      assert_equal 1, instance.one
+      assert_equal 1, instance.read_attribute_for_serialization(:one)
+
+      # Change via accessor
+      instance.one = :not_one
+
+      assert_equal :not_one, instance.one
+      assert_equal :not_one, instance.read_attribute_for_serialization(:one)
+    end
+
+    def test_id_attribute_can_be_read_for_serialization
+      klass = Class.new(ActiveModelSerializers::Model) do
+        attr_accessor :id, :one, :two, :three
+      end
+      self.class.const_set(:SomeTestModel, klass)
+      original_attributes = { id: :ego, one: 1, two: 2, three: 3 }
+      instance = klass.new(original_attributes)
+
+      # Initial value
+      assert_equal 1, instance.one
+      assert_equal 1, instance.read_attribute_for_serialization(:one)
+
+      # Change via accessor
+      instance.id = :superego
+
+      assert_equal :superego, instance.id
+      assert_equal :superego, instance.read_attribute_for_serialization(:id)
+    ensure
+      self.class.send(:remove_const, :SomeTestModel)
+    end
   end
 end