diff --git a/ext/v8/object.cc b/ext/v8/object.cc
index 400df1f..afddff8 100644
--- a/ext/v8/object.cc
+++ b/ext/v8/object.cc
@@ -82,16 +82,13 @@ VALUE Object::ForceDelete(VALUE self, VALUE key) {
 VALUE Object::SetAccessor(int argc, VALUE* argv, VALUE self) {
   VALUE name; VALUE get; VALUE set; VALUE data; VALUE settings; VALUE attribs;
   rb_scan_args(argc, argv, "24", &name, &get, &set, &data, &settings, &attribs);
-  AccessControl ac = v8::DEFAULT;
-  PropertyAttribute attrs = v8::None;
-  if (RTEST(settings)) {
-    ac = AccessControl(settings);
-  }
-  if (RTEST(attribs)) {
-    attrs = PropertyAttribute(attribs);
-  }
   Accessor::Info accessor(get, set, data);
-  return Bool(Object(self)->SetAccessor(String(name), accessor.Getter(), accessor.Setter(), accessor, ac, attrs));
+  return Bool(Object(self)->SetAccessor(String(name),
+                                        accessor.Getter(),
+                                        accessor.Setter(),
+                                        accessor,
+                                        AccessControl(settings),
+                                        PropertyAttribute(attribs)));
 }
 
 //
diff --git a/ext/v8/rr.h b/ext/v8/rr.h
index d690acd..1ba740f 100644
--- a/ext/v8/rr.h
+++ b/ext/v8/rr.h
@@ -38,14 +38,16 @@ public:
 
 template <class T> class Enum {
 public:
-  Enum<T>(VALUE value) {
+  Enum<T>(VALUE value, T defaultValue = 0) {
     this->value = value;
+    this->defaultValue = defaultValue;
   }
   inline operator T() {
-    return (T)(RTEST(value) ? NUM2INT(value) : 0);
+    return (T)(RTEST(value) ? NUM2INT(value) : defaultValue);
   }
 private:
   VALUE value;
+  T defaultValue;
 };
 
 /**
@@ -196,11 +198,11 @@ public:
 
 class PropertyAttribute: public Enum<v8::PropertyAttribute> {
 public:
-  inline PropertyAttribute(VALUE value) : Enum<v8::PropertyAttribute>(value) {}
+  inline PropertyAttribute(VALUE value) : Enum<v8::PropertyAttribute>(value, v8::None) {}
 };
 class AccessControl: public Enum<v8::AccessControl> {
 public:
-  inline AccessControl(VALUE value) : Enum<v8::AccessControl>(value) {}
+  inline AccessControl(VALUE value) : Enum<v8::AccessControl>(value, v8::DEFAULT) {}
 };
 
 class Accessor {