diff --git a/io/stomp/18-stomp.js b/io/stomp/18-stomp.js
index 61b77fa8..a1777333 100644
--- a/io/stomp/18-stomp.js
+++ b/io/stomp/18-stomp.js
@@ -452,7 +452,7 @@ module.exports = function(RED) {
             setStatusDisconnected(node);
 
             node.on("input", function(msg, send, done) {
-                node.client.ack(msg.messageId, node.topic, msg.transaction);
+                node.serverConnection.ack(msg.messageId, node.topic, msg.transaction);
                 done();
             });