Fix compatibility with thresholds

Before:
![before](https://f.cloud.github.com/assets/641409/169129/08960842-7a13-11e2-9186-405260bd0563.png)

After:
![after](https://f.cloud.github.com/assets/641409/169131/0b73cf9a-7a13-11e2-98e3-fd65576ce3d7.png)