diff --git a/server/server.js b/server/server.js
index d5415cc6..961d3da6 100755
--- a/server/server.js
+++ b/server/server.js
@@ -21,6 +21,10 @@ server.listen(port, function () {
 
 io.on('connection', function(socket){
 
+  socket.on('echo', function(data, callback) {
+    callback(data);
+  });
+
   var coll;
   var guid;
   var tot_lists = [];