diff --git a/chipdrivers.h b/chipdrivers.h
index a6faf9f..c01ab7a 100644
--- a/chipdrivers.h
+++ b/chipdrivers.h
@@ -110,6 +110,7 @@
 int unlock_sst_fwhub(struct flashchip *flash);
 
 /* w39.c */
+int printlock_w39l040(struct flashchip * flash);
 int printlock_w39v040a(struct flashchip *flash);
 int printlock_w39v040b(struct flashchip *flash);
 int printlock_w39v040c(struct flashchip *flash);