diff --git a/notebook/static/auth/js/loginmain.js b/notebook/static/auth/js/loginmain.js
index 025112188..964713b11 100644
--- a/notebook/static/auth/js/loginmain.js
+++ b/notebook/static/auth/js/loginmain.js
@@ -4,8 +4,6 @@
 define(['jquery', 'base/js/namespace', 'base/js/page'], function($, IPython, page) {
     function login_main() {
       var page_instance = new page.Page('div#header', 'div#site');
-      $('button#login_submit').addClass("btn btn-default");
-      $('button#login_new_pass_submit').addClass("btn btn-default");
       page_instance.show();
       $('input#password_input').focus();
       $('input#token_input').focus();
diff --git a/notebook/templates/login.html b/notebook/templates/login.html
index a3b2e2c84..77273a9cf 100644
--- a/notebook/templates/login.html
+++ b/notebook/templates/login.html
@@ -28,7 +28,7 @@
                 <label for="password_input"><strong>{% trans %}Password:{% endtrans %}</strong></label>
               {% endif %}
               <input type="password" name="password" id="password_input" class="form-control">
-              <button type="submit" id="login_submit">{% trans %}Log in{% endtrans %}</button>
+              <button type="submit" class="btn btn-default" id="login_submit">{% trans %}Log in{% endtrans %}</button>
             </form>
           </div>
         </div>
@@ -100,7 +100,7 @@ http://localhost:8888/?token=c8de56fa... :: /Users/you/notebooks
             <input type="password" name="new_password" id="new_password_input" class="form-control" required>
           </div>
           <div class="form-group">
-            <button type="submit" id="login_new_pass_submit">{% trans %}Log in and set new password{% endtrans %}</button>
+            <button type="submit" class="btn btn-default" id="login_new_pass_submit">{% trans %}Log in and set new password{% endtrans %}</button>
           </div>
         </form>
       {% endif %}