diff --git a/backend/src/api/websocket-handler.ts b/backend/src/api/websocket-handler.ts
index 41202e0fa..a20088128 100644
--- a/backend/src/api/websocket-handler.ts
+++ b/backend/src/api/websocket-handler.ts
@@ -565,7 +565,7 @@ class WebsocketHandler {
       }
       if (client['track-txs']) {
         for (const txid of client['track-txs']) {
-          trackedTxs.add(client['track-tx']);
+          trackedTxs.add(txid);
         }
       }
     });