diff --git a/lib/rt64 b/lib/rt64
index 1b92e76..64b9e16 160000
--- a/lib/rt64
+++ b/lib/rt64
@@ -1 +1 @@
-Subproject commit 1b92e76951f0a5673b0a7f47627cf34605e0ca49
+Subproject commit 64b9e166f75b4dc44a59983b67c3e9ecc1f4cfd7