diff --git a/src/LedMqttSubscriber.cpp b/src/LedMqttSubscriber.cpp
index 003a476..19197a4 100644
--- a/src/LedMqttSubscriber.cpp
+++ b/src/LedMqttSubscriber.cpp
@@ -128,13 +128,13 @@ void MqttClient::checkTimeout(std::chrono::seconds timeout)
     }
 }
 
-int MqttClient::getGear()
+int MqttClient::getGear() const
 {
     std::lock_guard<std::mutex> lock(dataMutex);
     return gear;
 }
 
-double MqttClient::getSpeed()
+double MqttClient::getSpeed() const
 {
     std::lock_guard<std::mutex> lock(dataMutex);
     return speed;