diff --git a/lib/rt64 b/lib/rt64
index 4e27fd2..5164996 160000
--- a/lib/rt64
+++ b/lib/rt64
@@ -1 +1 @@
-Subproject commit 4e27fd2ba9426284a207c7422e76a54eb639e96c
+Subproject commit 51649963618de9b3067eee398090946ae9004954