1 files changed, 3 insertions, 3 deletions
diff --git a/MediaBrowser.Api/UserLibrary/GenresService.cs b/MediaBrowser.Api/UserLibrary/GenresService.cs
index 63c0575bf..070246886 100644
--- a/MediaBrowser.Api/UserLibrary/GenresService.cs
+++ b/MediaBrowser.Api/UserLibrary/GenresService.cs
@@ -39,7 +39,7 @@ 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 Guid? UserId { get; set; }
+        public string UserId { get; set; }
     }
 
     /// <summary>
@@ -76,9 +76,9 @@ namespace MediaBrowser.Api.UserLibrary
 
             var dtoOptions = GetDtoOptions(request);
 
-            if (request.UserId.HasValue)
+            if (!string.IsNullOrWhiteSpace(request.UserId))
             {
-                var user = UserManager.GetUserById(request.UserId.Value);
+                var user = UserManager.GetUserById(request.UserId);
 
                 return DtoService.GetBaseItemDto(item, dtoOptions, user);
             }