diff --git a/lib/action_controller/serialization.rb b/lib/action_controller/serialization.rb
index d52c6800..b4cbc73d 100644
--- a/lib/action_controller/serialization.rb
+++ b/lib/action_controller/serialization.rb
@@ -52,7 +52,7 @@ module ActionController
       end
 
       if serializer
-        options[:scope] = serialization_scope
+        options[:scope] = serialization_scope unless options.has_key?(:scope)
         options[:url_options] = url_options
         json = serializer.new(json, options.merge(default_serializer_options || {}))
       end
diff --git a/test/serialization_test.rb b/test/serialization_test.rb
index 9706f70a..2bcc1c9a 100644
--- a/test/serialization_test.rb
+++ b/test/serialization_test.rb
@@ -131,6 +131,12 @@ class RenderJsonTest < ActionController::TestCase
       render :json => JsonSerializable.new, :options => true
     end
 
+    def render_json_with_serializer_and_scope_option
+      @current_user = Struct.new(:as_json).new(:current_user => true)
+      scope = Struct.new(:as_json).new(:current_user => false)
+      render :json => JsonSerializable.new, :scope => scope
+    end
+
     def render_json_with_serializer_api_but_without_serializer
       @current_user = Struct.new(:as_json).new(:current_user => true)
       render :json => JsonSerializable.new(true)
@@ -259,6 +265,11 @@ class RenderJsonTest < ActionController::TestCase
     assert_match '"options":true', @response.body
   end
 
+  def test_render_json_with_serializer_and_scope_option
+    get :render_json_with_serializer_and_scope_option
+    assert_match '"scope":{"current_user":false}', @response.body
+  end
+
   def test_render_json_with_serializer_api_but_without_serializer
     get :render_json_with_serializer_api_but_without_serializer
     assert_match '{"serializable_object":true}', @response.body