diff --git a/ocaml/Qmcchem_dataserver.ml b/ocaml/Qmcchem_dataserver.ml
index 6386771..3067996 100644
--- a/ocaml/Qmcchem_dataserver.ml
+++ b/ocaml/Qmcchem_dataserver.ml
@@ -98,8 +98,7 @@ let run ?(daemon=true) ezfio_filename =
         let result = 
           try
             ZMQ.Socket.bind socket address;
-            ZMQ.Socket.unbind socket address; 
-            accu;
+            accu
           with
           | _ -> false;
         in