README.md in enum_help-0.0.8 vs README.md in enum_help-0.0.9

@@ -45,11 +45,11 @@
     order.status
     # > nopayment
     order.status_i18n # if you have an i18n file defined as following, it will return "未支付".
     # > 未支付
 
-In _form.html.erb using simple form:
+In _form.html.erb using simple_form:
 
     <%= f.input :status %>
 
 This will generate select field with translations automaticlly.
 
@@ -77,9 +77,18 @@
           status:
             finished: 完成
             nopayment: 未支付
             failed: 失败
             destroyed: 已删除
+
+
+## Notice
+If you want to use enum feature,
+field of your table can't be named with reference.
+When it is named with 'reference' and define enum in model file, there will be raise an error as below:
+
+    NoMethodError: super: no superclass method `enum' for...
+
 
 ## Thanks
 * [mrhead](https://github.com/mrhead)
 * [Jin Lee](https://github.com/neojin)