Android : Android Compile Error, cannot find 'corners' attribute

I cannot figure out why my Android Studio is giving me this error when I am trying to make my FrameLayout have rounded edges. This is the exact error it gives me "Error:(162) No resource identifier found for attribute 'corners' in package 'android'", I have rebuilt my project to see if that was the problem but fortunately it wasn't, can someone explain. I am running version 0.8 Android Studio and my Lowest SDK Version is API 13.

The XML layout file that gives me the error

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
    android:shape="rectangle">
    <solid android:color="#ffffff"/>
    <corners android:radius="10dip"/>
    <stroke android:color="#000000" android:width="1dp"/>
</shape>