diff --git a/samples/CookieSample/Startup.cs b/samples/CookieSample/Startup.cs
index cff673d752..aae3191ac2 100644
--- a/samples/CookieSample/Startup.cs
+++ b/samples/CookieSample/Startup.cs
@@ -2,6 +2,7 @@ using System.Security.Claims;
 using Microsoft.AspNet.Builder;
 using Microsoft.AspNet.Http;
 using Microsoft.AspNet.Security.Cookies;
+using Microsoft.AspNet.Security.DataProtection;
 
 namespace CookieSample
 {
@@ -9,6 +10,11 @@ namespace CookieSample
     {
         public void Configure(IApplicationBuilder app)
         {
+            app.UseServices(services =>
+            {
+                services.Add(DataProtectionServices.GetDefaultServices());
+            });
+
             app.UseCookieAuthentication(options =>
             {
             });
diff --git a/samples/CookieSessionSample/Startup.cs b/samples/CookieSessionSample/Startup.cs
index 2b6cfd8464..72a5c1ff97 100644
--- a/samples/CookieSessionSample/Startup.cs
+++ b/samples/CookieSessionSample/Startup.cs
@@ -3,6 +3,7 @@ using System.Security.Claims;
 using Microsoft.AspNet.Builder;
 using Microsoft.AspNet.Http;
 using Microsoft.AspNet.Security.Cookies;
+using Microsoft.AspNet.Security.DataProtection;
 
 namespace CookieSessionSample
 {
@@ -10,6 +11,11 @@ namespace CookieSessionSample
     {
         public void Configure(IApplicationBuilder app)
         {
+            app.UseServices(services =>
+            {
+                services.Add(DataProtectionServices.GetDefaultServices());
+            });
+
             app.UseCookieAuthentication(options => 
             {
                 options.SessionStore = new MemoryCacheSessionStore();
diff --git a/samples/SocialSample/Startup.cs b/samples/SocialSample/Startup.cs
index 162a1b5539..f6070b9ff7 100644
--- a/samples/SocialSample/Startup.cs
+++ b/samples/SocialSample/Startup.cs
@@ -1,5 +1,3 @@
-using System;
-using System.Collections.Generic;
 using System.Net.Http;
 using System.Net.Http.Headers;
 using System.Security.Claims;
@@ -8,13 +6,12 @@ using Microsoft.AspNet.Http;
 using Microsoft.AspNet.Http.Security;
 using Microsoft.AspNet.Security;
 using Microsoft.AspNet.Security.Cookies;
-using Microsoft.AspNet.Security.Facebook;
+using Microsoft.AspNet.Security.DataProtection;
 using Microsoft.AspNet.Security.Google;
 using Microsoft.AspNet.Security.MicrosoftAccount;
 using Microsoft.AspNet.Security.OAuth;
-using Microsoft.AspNet.Security.Twitter;
-using Newtonsoft.Json.Linq;
 using Microsoft.Framework.DependencyInjection;
+using Newtonsoft.Json.Linq;
 
 namespace CookieSample
 {
@@ -26,6 +23,7 @@ namespace CookieSample
 
             app.UseServices(services =>
             {
+                services.Add(DataProtectionServices.GetDefaultServices());
                 services.Configure<ExternalAuthenticationOptions>(options =>
                 {
                     options.SignInAsAuthenticationType = CookieAuthenticationDefaults.AuthenticationType;