diff --git a/flash.h b/flash.h
index 806ef08..0606f00 100644
--- a/flash.h
+++ b/flash.h
@@ -736,5 +736,8 @@
 uint8_t serprog_chip_readb(const chipaddr addr);
 void serprog_chip_readn(uint8_t *buf, const chipaddr addr, size_t len);
 void serprog_delay(int delay);
+void sp_flush_incoming(void);
+int sp_openserport(char *dev, unsigned int baud);
+extern int sp_fd;
 
 #endif				/* !__FLASH_H__ */