diff --git a/src/as/com/threerings/presents/client/Communicator.as b/src/as/com/threerings/presents/client/Communicator.as
index 6d78d91e3..ca8d55310 100644
--- a/src/as/com/threerings/presents/client/Communicator.as
+++ b/src/as/com/threerings/presents/client/Communicator.as
@@ -285,6 +285,7 @@ public class Communicator
 
         // total failure
         Log.getLog(this).warning("socket error: " + event);
+        Log.dumpStack();
         shutdown(new Error("socket closed unexpectedly."));
     }