Regression(@664ec67672): Fix a bug about Tumblr Model on Mac

Full Commit ID: 664ec67672f78eb5e458236963f6cabcfbce9317

via https://twitter.com/jplee/status/433143195195551744

Thanks, jplee!
v0.1.2

* Regression(@664ec67672): Fix a bug about Tumblr Model on Mac