diff --git a/OpenSim/Addons/Groups/GroupsModule.cs b/OpenSim/Addons/Groups/GroupsModule.cs
index cdc98f5908..1a83f5bcbc 100644
--- a/OpenSim/Addons/Groups/GroupsModule.cs
+++ b/OpenSim/Addons/Groups/GroupsModule.cs
@@ -194,6 +194,7 @@ namespace OpenSim.Groups
             scene.EventManager.OnMakeRootAgent -= OnMakeRoot;
             scene.EventManager.OnMakeChildAgent -= OnMakeChild;
             scene.EventManager.OnIncomingInstantMessage -= OnGridInstantMessage;
+            scene.EventManager.OnClientClosed -= OnClientClosed;
 
             lock (m_sceneList)
             {