diff --git a/pm49fl00x.c b/pm49fl00x.c
index 9d104e2..e8c498d 100644
--- a/pm49fl00x.c
+++ b/pm49fl00x.c
@@ -36,6 +36,12 @@
 	}
 }
 
+int unlock_49fl00x(struct flashchip *flash)
+{
+	write_lockbits_49fl00x(flash->virtual_registers, flash->total_size * 1024, 0, flash->page_size);
+	return 0;
+}
+
 int erase_49fl00x(struct flashchip *flash)
 {
 	int i;