diff --git a/sst49lfxxxc.c b/sst49lfxxxc.c
index 80e5520..a65450e 100644
--- a/sst49lfxxxc.c
+++ b/sst49lfxxxc.c
@@ -82,6 +82,11 @@
 	return 0;
 }
 
+int unlock_49lfxxxc(struct flashchip *flash)
+{
+	return write_lockbits_49lfxxxc(flash, 0);
+}
+
 int erase_sector_49lfxxxc(struct flashchip *flash, unsigned int address, unsigned int sector_size)
 {
 	unsigned char status;