diff --git a/src/mqtt.cpp b/src/mqtt.cpp
index e0ddda2c7..2b931be8c 100644
--- a/src/mqtt.cpp
+++ b/src/mqtt.cpp
@@ -598,7 +598,8 @@ bool Mqtt::queue_message(const uint8_t operation, const std::string & topic, con
             mqtt_message_id_++;
             mqtt_publish_fails_++;
         }
-        return false; // quit, not using MQTT
+        LOG_DEBUG("%s failed: low memory", operation == Operation::PUBLISH ? "Publish" : operation == Operation::SUBSCRIBE ? "Subscribe" : "Unsubscribe");
+        return false; // quit
     }
 
     uint16_t packet_id = 0;