diff --git a/lib/controller.js b/lib/controller.js
index dc651a90c..fc609be94 100644
--- a/lib/controller.js
+++ b/lib/controller.js
@@ -316,6 +316,8 @@ class Controller {
     }
 
     handleMQTTMessage(topic, message) {
+        logger.debug(`Incoming MQTT message '${topic}' '${message.toString()}'`);
+
         if (topic.match(mqttConfigRegex)) {
             this.handleMQTTMessageConfig(topic, message);
         } else if (topic.match(mqttDeviceRegex) || topic.match(mqttDevicePrefixRegex)) {