diff --git a/jacdac-spec b/jacdac-spec
index 2ba419c8d..b2dc8ab34 160000
--- a/jacdac-spec
+++ b/jacdac-spec
@@ -1 +1 @@
-Subproject commit 2ba419c8d2e744992e620a538aedc974de327fda
+Subproject commit b2dc8ab34a87899fd6692c1f59f143b5d55149e9