diff --git a/src/analogsensor.cpp b/src/analogsensor.cpp
index 85651df01..5c438d18e 100644
--- a/src/analogsensor.cpp
+++ b/src/analogsensor.cpp
@@ -231,7 +231,7 @@ bool AnalogSensor::updated_values() {
 }
 
 // publish a single sensor to MQTT
-void AnalogSensor::publish_sensor(Sensor sensor) {
+void AnalogSensor::publish_sensor(const Sensor & sensor) {
     if (Mqtt::publish_single()) {
         char topic[Mqtt::MQTT_TOPIC_MAX_SIZE];
         snprintf(topic, sizeof(topic), "%s/%s", read_flash_string(F_(analogsensor)).c_str(), sensor.name().c_str());
diff --git a/src/analogsensor.h b/src/analogsensor.h
index e07191826..70e94fd95 100644
--- a/src/analogsensor.h
+++ b/src/analogsensor.h
@@ -119,7 +119,7 @@ class AnalogSensor {
 
     void start();
     void loop();
-    void publish_sensor(Sensor sensor);
+    void publish_sensor(const Sensor & sensor);
     void publish_values(const bool force);
     void reload();
     bool updated_values();