diff --git a/dl-c-impl/ckb-c-stdlib b/dl-c-impl/ckb-c-stdlib
index b51f9b1..648d20d 160000
--- a/dl-c-impl/ckb-c-stdlib
+++ b/dl-c-impl/ckb-c-stdlib
@@ -1 +1 @@
-Subproject commit b51f9b1b6221398c76c6bb78d63a430d93e791bf
+Subproject commit 648d20d73f321281576aa323b2ec9844f4e6dc1a