1 files changed, 5 insertions, 4 deletions
diff --git a/MediaBrowser.Api/UserLibrary/YearsService.cs b/MediaBrowser.Api/UserLibrary/YearsService.cs
index db622a9b3..30ac88e00 100644
--- a/MediaBrowser.Api/UserLibrary/YearsService.cs
+++ b/MediaBrowser.Api/UserLibrary/YearsService.cs
@@ -7,6 +7,7 @@ using MediaBrowser.Model.Dto;
 using System.Collections.Generic;
 using System.Linq;
 using MediaBrowser.Model.Services;
+using System;
 
 namespace MediaBrowser.Api.UserLibrary
 {
@@ -36,7 +37,7 @@ namespace MediaBrowser.Api.UserLibrary
         /// </summary>
         /// <value>The user id.</value>
         [ApiMember(Name = "UserId", Description = "Optional. Filter by user id, and attach user data", IsRequired = false, DataType = "string", ParameterType = "query", Verb = "GET")]
-        public string UserId { get; set; }
+        public Guid UserId { get; set; }
     }
 
     /// <summary>
@@ -54,7 +55,7 @@ namespace MediaBrowser.Api.UserLibrary
         {
             var result = GetItem(request);
 
-            return ToOptimizedSerializedResultUsingCache(result);
+            return ToOptimizedResult(result);
         }
 
         /// <summary>
@@ -68,7 +69,7 @@ namespace MediaBrowser.Api.UserLibrary
             
             var dtoOptions = GetDtoOptions(AuthorizationContext, request);
 
-            if (!string.IsNullOrWhiteSpace(request.UserId))
+            if (!request.UserId.Equals(Guid.Empty))
             {
                 var user = UserManager.GetUserById(request.UserId);
 
@@ -87,7 +88,7 @@ namespace MediaBrowser.Api.UserLibrary
         {
             var result = GetResult(request);
 
-            return ToOptimizedSerializedResultUsingCache(result);
+            return ToOptimizedResult(result);
         }
 
         /// <summary>