diff --git a/CryptoExchange.Net/SharedApis/ResponseModels/SharedId.cs b/CryptoExchange.Net/SharedApis/ResponseModels/SharedId.cs
index 24147b8d..2fda4f74 100644
--- a/CryptoExchange.Net/SharedApis/ResponseModels/SharedId.cs
+++ b/CryptoExchange.Net/SharedApis/ResponseModels/SharedId.cs
@@ -6,14 +6,14 @@
     public record SharedId
     {
         /// <summary>
-        /// The id
+        /// The id, note that this can be null or empty if the API doesn't return an ID.
         /// </summary>
-        public string Id { get; set; }
+        public string? Id { get; set; }
 
         /// <summary>
         /// Id
         /// </summary>
-        public SharedId(string id)
+        public SharedId(string? id)
         {
             Id = id;
         }