diff --git a/flash.h b/flash.h
index 67f49c6..37d7dc0 100644
--- a/flash.h
+++ b/flash.h
@@ -396,6 +396,7 @@
 void it8716f_spi_page_program(int block, uint8_t *buf, uint8_t *bios);
 
 /* jedec.c */
+uint8_t oddparity(uint8_t val);
 void toggle_ready_jedec(volatile uint8_t *dst);
 void data_polling_jedec(volatile uint8_t *dst, uint8_t data);
 void unprotect_jedec(volatile uint8_t *bios);