diff --git a/Duplicati/Server/WebServer/Server.cs b/Duplicati/Server/WebServer/Server.cs
index ac22391ef..7c23994e0 100644
--- a/Duplicati/Server/WebServer/Server.cs
+++ b/Duplicati/Server/WebServer/Server.cs
@@ -3,6 +3,7 @@ using System.Collections.Generic;
 using System.Linq;
 using HttpServer.HttpModules;
 using System.Security.Cryptography.X509Certificates;
+using Duplicati.Library.IO;
 
 namespace Duplicati.Server.WebServer
 {