diff --git a/shell/watcher.js b/shell/watcher.js
index 023a7d2..7715219 100644
--- a/shell/watcher.js
+++ b/shell/watcher.js
@@ -152,7 +152,7 @@ wss.on('connection', function connection(ws) {
   console.log('WebSocket client connected');
 
   // Send initial state
-  ws.send_ws_message(calculateDiff({}, progvars));
+  ws.send(calculateDiff({}, progvars));
 
   ws.on('message', function incoming(message) {
     console.log('received: %s', message);