diff --git a/ESP32-IDF_ESPNOW-Receiver/main/espnow_receiver_main.c b/ESP32-IDF_ESPNOW-Receiver/main/espnow_receiver_main.c
index fe3fa798d..514a89143 100644
--- a/ESP32-IDF_ESPNOW-Receiver/main/espnow_receiver_main.c
+++ b/ESP32-IDF_ESPNOW-Receiver/main/espnow_receiver_main.c
@@ -18,6 +18,7 @@
 */
 
 #include <stdlib.h>
+#include <string.h>
 #include "freertos/FreeRTOS.h"
 #include "nvs_flash.h"
 #include "esp_err.h"