diff --git a/ESP32-IDF_Temperture-Node-v2/main/hello_world_main.c b/ESP32-IDF_Temperture-Node-v2/main/hello_world_main.c
index 7a1e0ec87..0bd666a76 100644
--- a/ESP32-IDF_Temperture-Node-v2/main/hello_world_main.c
+++ b/ESP32-IDF_Temperture-Node-v2/main/hello_world_main.c
@@ -25,6 +25,7 @@
 #include "esp_now.h"
 #include "esp_mac.h"
 #include "esp_wifi.h"
+#include "esp_system.h"
 
 #include "config.h"
 #include "mqttronix.h"