diff --git a/src/Microsoft.AspNet.Http.Core/Authentication/AuthenticationManager.cs b/src/Microsoft.AspNet.Http.Core/Authentication/AuthenticationManager.cs
index 219e909221..f7b4342b59 100644
--- a/src/Microsoft.AspNet.Http.Core/Authentication/AuthenticationManager.cs
+++ b/src/Microsoft.AspNet.Http.Core/Authentication/AuthenticationManager.cs
@@ -17,22 +17,27 @@ namespace Microsoft.AspNet.Http.Authentication
 
         public virtual void Challenge()
         {
-            Challenge(properties: null, authenticationScheme: null);
+            Challenge(authenticationScheme: null, properties: null);
         }
 
         public virtual void Challenge(AuthenticationProperties properties)
         {
-            Challenge(properties, "");
+            Challenge(authenticationScheme: null, properties: properties);
         }
 
         public virtual void Challenge(string authenticationScheme)
         {
-            Challenge(properties: null, authenticationScheme: authenticationScheme);
+            Challenge(authenticationScheme: authenticationScheme, properties: null);
         }
 
-        public abstract void Challenge(AuthenticationProperties properties, string authenticationScheme);
+        public abstract void Challenge(string authenticationScheme, AuthenticationProperties properties);
 
-        public abstract void SignIn(string authenticationScheme, ClaimsPrincipal principal, AuthenticationProperties properties = null);
+        public void SignIn(string authenticationScheme, ClaimsPrincipal principal)
+        {
+            SignIn(authenticationScheme, principal, properties: null);
+        }
+
+        public abstract void SignIn(string authenticationScheme, ClaimsPrincipal principal, AuthenticationProperties properties);
 
         public virtual void SignOut()
         {
diff --git a/src/Microsoft.AspNet.Http/Authentication/DefaultAuthenticationManager.cs b/src/Microsoft.AspNet.Http/Authentication/DefaultAuthenticationManager.cs
index 6f1c3ba419..f4d086b63d 100644
--- a/src/Microsoft.AspNet.Http/Authentication/DefaultAuthenticationManager.cs
+++ b/src/Microsoft.AspNet.Http/Authentication/DefaultAuthenticationManager.cs
@@ -97,7 +97,7 @@ namespace Microsoft.AspNet.Http.Authentication
                 new AuthenticationDescription(authenticateContext.Description));
         }
 
-        public override void Challenge(AuthenticationProperties properties, string authenticationScheme)
+        public override void Challenge(string authenticationScheme, AuthenticationProperties properties)
         {
             HttpResponseFeature.StatusCode = 401;
             var handler = HttpAuthenticationFeature.Handler;