diff --git a/src/Umbraco.Web/Telemetry/ReportSiteTask.cs b/src/Umbraco.Web/Telemetry/ReportSiteTask.cs
index 0613e37bab..7c2913a465 100644
--- a/src/Umbraco.Web/Telemetry/ReportSiteTask.cs
+++ b/src/Umbraco.Web/Telemetry/ReportSiteTask.cs
@@ -2,6 +2,7 @@
 using System;
 using System.IO;
 using System.Net.Http;
+using System.Runtime.Serialization;
 using System.Text;
 using System.Threading;
 using System.Threading.Tasks;