diff --git a/OpenSim/Region/Environment/Modules/Agent/TextureSender/TextureSender.cs b/OpenSim/Region/Environment/Modules/Agent/TextureSender/TextureSender.cs
index 53be7c5b62..583062d8b3 100644
--- a/OpenSim/Region/Environment/Modules/Agent/TextureSender/TextureSender.cs
+++ b/OpenSim/Region/Environment/Modules/Agent/TextureSender/TextureSender.cs
@@ -176,6 +176,9 @@ namespace OpenSim.Region.Environment.Modules.Agent.TextureSender
         // See ITextureSender
         public void UpdateRequest(int discardLevel, uint packetNumber)
         {
+            if (download == null)
+                return;
+
             lock (download)
             {
                 if (discardLevel < download.DiscardLevel)