diff --git a/flash.h b/flash.h
index a843b9d..bf52a56 100644
--- a/flash.h
+++ b/flash.h
@@ -654,6 +654,7 @@
 void spi_byte_program(int address, uint8_t byte);
 int spi_nbyte_read(int address, uint8_t *bytes, int len);
 int spi_aai_write(struct flashchip *flash, uint8_t *buf);
+uint32_t spi_get_valid_read_addr(void);
 
 /* 82802ab.c */
 int probe_82802ab(struct flashchip *flash);