missing c&p

diff --git a/OpenSim/Framework/Servers/HttpServer/OSHttpServer/HttpClientContext.cs b/OpenSim/Framework/Servers/HttpServer/OSHttpServer/HttpClientContext.cs
index c3f8680..70e7adf 100644
--- a/OpenSim/Framework/Servers/HttpServer/OSHttpServer/HttpClientContext.cs
+++ b/OpenSim/Framework/Servers/HttpServer/OSHttpServer/HttpClientContext.cs
@@ -9,6 +9,7 @@ using OSHttpServer.Parser;
 using System.Net.Security;
 using System.Security.Cryptography.X509Certificates;
 using OpenMetaverse;
+using System.Threading.Tasks;

 namespace OSHttpServer
 {