diff --git a/examples/BresserWeatherSensorMQTT/BresserWeatherSensorMQTT.ino b/examples/BresserWeatherSensorMQTT/BresserWeatherSensorMQTT.ino
index 9b7cf3e6..6dbbea7b 100644
--- a/examples/BresserWeatherSensorMQTT/BresserWeatherSensorMQTT.ino
+++ b/examples/BresserWeatherSensorMQTT/BresserWeatherSensorMQTT.ino
@@ -105,6 +105,7 @@
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 #include <Arduino.h>
+#include <String.h>
 
 // BEGIN User specific options
 #define LED_EN                  // Enable LED indicating successful data reception