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 0bd666a76..910236782 100644
--- a/ESP32-IDF_Temperture-Node-v2/main/hello_world_main.c
+++ b/ESP32-IDF_Temperture-Node-v2/main/hello_world_main.c
@@ -21,6 +21,7 @@
 #include "esp_log.h"
 #include "i2c_bus.h"
 #include "bme280.h"
+#include "esp_crc.h"
 #include "esp_netif.h"
 #include "esp_now.h"
 #include "esp_mac.h"