diff --git a/lib/rt64 b/lib/rt64
index a0a0f94..6ad51c7 160000
--- a/lib/rt64
+++ b/lib/rt64
@@ -1 +1 @@
-Subproject commit a0a0f94a01cc4895836abd23760c8b9591968045
+Subproject commit 6ad51c7557e4ad0b512547d822a31982bc84d960