diff --git a/programmer.h b/programmer.h
index deaafc4..d392027 100644
--- a/programmer.h
+++ b/programmer.h
@@ -425,6 +425,7 @@
 	uint16_t (*chip_readw) (const struct flashctx *flash, const chipaddr addr);
 	uint32_t (*chip_readl) (const struct flashctx *flash, const chipaddr addr);
 	void (*chip_readn) (const struct flashctx *flash, uint8_t *buf, const chipaddr addr, size_t len);
+	int (*shutdown)(void *data);
 	void *data;
 };
 int register_par_master(const struct par_master *mst, const enum chipbustype buses, void *data);