diff --git a/programmer.h b/programmer.h
index 97c3a8a..4aa9eda 100644
--- a/programmer.h
+++ b/programmer.h
@@ -319,6 +319,7 @@
 	int (*read)(struct flashctx *flash, uint8_t *buf, unsigned int start, unsigned int len);
 	int (*write_256)(struct flashctx *flash, const uint8_t *buf, unsigned int start, unsigned int len);
 	int (*write_aai)(struct flashctx *flash, const uint8_t *buf, unsigned int start, unsigned int len);
+	int (*shutdown)(void *data);
 	void *data;
 };
 
diff --git a/spi.c b/spi.c
index 5ee9a24..b7a7a21 100644
--- a/spi.c
+++ b/spi.c
@@ -133,6 +133,13 @@
 {
 	struct registered_master rmst;
 
+	if (mst->shutdown) {
+		if (register_shutdown(mst->shutdown, data)) {
+			mst->shutdown(data); /* cleanup */
+			return 1;
+		}
+	}
+
 	if (!mst->write_aai || !mst->write_256 || !mst->read || !mst->command ||
 	    !mst->multicommand ||
 	    ((mst->command == default_spi_send_command) &&