diff --git a/boards/xtensa/esp32s3/esp32s3-eye/src/esp32s3-eye.h b/boards/xtensa/esp32s3/esp32s3-eye/src/esp32s3-eye.h
index 46fe3522c6b..2b0d143a431 100644
--- a/boards/xtensa/esp32s3/esp32s3-eye/src/esp32s3-eye.h
+++ b/boards/xtensa/esp32s3/esp32s3-eye/src/esp32s3-eye.h
@@ -85,6 +85,18 @@ int esp32s3_bringup(void);
 int esp32s3_gpio_init(void);
 #endif
 
+/****************************************************************************
+ * Name: board_spiflash_init
+ *
+ * Description:
+ *   Initialize the SPIFLASH and register the MTD device.
+ *
+ ****************************************************************************/
+
+#ifdef CONFIG_ESP32S3_SPIFLASH
+int board_spiflash_init(void);
+#endif
+
 /****************************************************************************
  * Name: board_i2c_init
  *