diff --git a/src/Microsoft.AspNet.Http.Abstractions/CookieOptions.cs b/src/Microsoft.AspNet.Http.Abstractions/CookieOptions.cs
index d2785db947..5cf29be6a2 100644
--- a/src/Microsoft.AspNet.Http.Abstractions/CookieOptions.cs
+++ b/src/Microsoft.AspNet.Http.Abstractions/CookieOptions.cs
@@ -34,7 +34,7 @@ namespace Microsoft.AspNet.Http
         /// Gets or sets the expiration date and time for the cookie.
         /// </summary>
         /// <returns>The expiration date and time for the cookie.</returns>
-        public DateTime? Expires { get; set; }
+        public DateTimeOffset? Expires { get; set; }
 
         /// <summary>
         /// Gets or sets a value that indicates whether to transmit the cookie using Secure Sockets Layer (SSL)�that is, over HTTPS only.