diff --git a/chipdrivers.h b/chipdrivers.h
index bd81098..e3eb978 100644
--- a/chipdrivers.h
+++ b/chipdrivers.h
@@ -157,4 +157,10 @@
 int erase_sector_stm50flw0x0x(struct flashctx *flash, unsigned int block, unsigned int blocksize);
 int unlock_stm50flw0x0x(struct flashctx *flash);
 
+/* en29lv640b.c */
+int probe_en29lv640b(struct flashctx *flash);
+int block_erase_en29lv640b(struct flashctx *flash, unsigned int start, unsigned int len);
+int block_erase_chip_en29lv640b(struct flashctx *flash, unsigned int start, unsigned int len);
+int write_en29lv640b(struct flashctx *flash, uint8_t *buf, unsigned int start, unsigned int len);
+
 #endif /* !__CHIPDRIVERS_H__ */