Is there a way to force the Facebook Login Button so it displays "Log in" as opposed to "Log in with Facebook"? Below is what it looks like on an iPhone 6

And below on an iPhone 6 Plus

I have briefly looked at the Facebook SDK on Github and have failed to come up with a solution. Facebook basically looks at the width of the button then displays the appropriate text. I don't want the text to overrun like it is on the iPhone 6 Plus.