diff --git a/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs b/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs
index e52a19579b..a8944605ca 100644
--- a/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs
+++ b/OpenSim/Region/CoreModules/Framework/EntityTransfer/EntityTransferModule.cs
@@ -314,6 +314,9 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
                 return;
             }
 
+            if (IsInTransit(sp.UUID)) // Avie is already on the way. Caller shouldn't do this.
+                return;
+
             m_log.DebugFormat(
                 "[ENTITY TRANSFER MODULE]: Request Teleport to {0} ({1}) {2}/{3}",
                 reg.ServerURI, finalDestination.ServerURI, finalDestination.RegionName, position);
@@ -1870,6 +1873,16 @@ namespace OpenSim.Region.CoreModules.Framework.EntityTransfer
             }
         }
 
+        protected bool IsInTransit(UUID id)
+        {
+            lock (m_agentsInTransit)
+            {
+                if (m_agentsInTransit.Contains(id))
+                    return true;
+            }
+            return false;
+        }
+
         protected bool ResetFromTransit(UUID id)
         {
             lock (m_agentsInTransit)