diff --git a/include/ChassisIntrusionSensor.hpp b/include/ChassisIntrusionSensor.hpp
index a86dabc..142ced3 100644
--- a/include/ChassisIntrusionSensor.hpp
+++ b/include/ChassisIntrusionSensor.hpp
@@ -53,7 +53,7 @@
 
     bool mInitialized = false;
 
-    void updateValue(const std::string newValue);
+    void updateValue(const std::string& newValue);
     int i2cReadFromPch(int busId, int slaveAddr);
     void pollSensorStatusByPch();
     void readGpio();