diff --git a/RxExample/RxExample/Examples/GitHubSignup/Views/GitHubSignupViewController.swift b/RxExample/RxExample/Examples/GitHubSignup/Views/GitHubSignupViewController.swift
index 55707b26..98b65cf8 100644
--- a/RxExample/RxExample/Examples/GitHubSignup/Views/GitHubSignupViewController.swift
+++ b/RxExample/RxExample/Examples/GitHubSignup/Views/GitHubSignupViewController.swift
@@ -156,8 +156,6 @@ class GitHubSignupViewController : ViewController {
         let tapBackground = UITapGestureRecognizer(target: self, action: Selector("dismissKeyboard:"))
         view.addGestureRecognizer(tapBackground)
         
-        self.disposeBag = DisposeBag()
-        
         let API = self.API
         
         let validationService = ValidationService(API: API)