diff --git a/packages/node_modules/@node-red/nodes/core/network/10-mqtt.js b/packages/node_modules/@node-red/nodes/core/network/10-mqtt.js
index 4462f20cc..37841770a 100644
--- a/packages/node_modules/@node-red/nodes/core/network/10-mqtt.js
+++ b/packages/node_modules/@node-red/nodes/core/network/10-mqtt.js
@@ -393,6 +393,7 @@ module.exports = function(RED) {
                                     if (node.subscriptions[s].hasOwnProperty(r)) {
                                         qos = Math.max(qos,node.subscriptions[s][r].qos);
                                         _options = node.subscriptions[s][r].options;
+                                        debug(`MQTT: Adding handler for ${r} to ${s}`);
                                         node.client.on('message',node.subscriptions[s][r].handler);
                                     }
                                 }