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 de6b07f69..b4981bb7e 100644
--- a/ESP32-IDF_Temperture-Node-v2/main/hello_world_main.c
+++ b/ESP32-IDF_Temperture-Node-v2/main/hello_world_main.c
@@ -26,6 +26,7 @@
 */
 
 #include <stdio.h>
+#include "freertos/FreeRTOS.h"
 #include "esp_log.h"
 #include "i2c_bus.h"
 #include "bme280.h"