diff --git a/source/symbiflow-arch-defs b/source/symbiflow-arch-defs
index df737cd..21fc764 160000
--- a/source/symbiflow-arch-defs
+++ b/source/symbiflow-arch-defs
@@ -1 +1 @@
-Subproject commit df737cdbb37fa3ce7afee4fc868be58aa55afbb7
+Subproject commit 21fc7640924550f01f61f137a5f61c6683d8fc98