diff --git a/src/Discord.Net.Rest/Entities/Interactions/InteractionHelper.cs b/src/Discord.Net.Rest/Entities/Interactions/InteractionHelper.cs
index 6241722c..d412fc41 100644
--- a/src/Discord.Net.Rest/Entities/Interactions/InteractionHelper.cs
+++ b/src/Discord.Net.Rest/Entities/Interactions/InteractionHelper.cs
@@ -480,7 +480,9 @@ namespace Discord.Rest
             }
             else
             {
-                var apiArgs = new UploadWebhookFileParams(args.Attachments.Value.ToArray())
+                var attachments = args.Attachments.Value?.ToArray() ?? Array.Empty<FileAttachment>();
+
+                var apiArgs = new UploadWebhookFileParams(attachments)
                 {
                     Content = args.Content,
                     Embeds = apiEmbeds?.ToArray() ?? Optional<API.Embed[]>.Unspecified,