diff --git a/tools/yosys b/tools/yosys
index 8449dd4700..9ed031ddd5 160000
--- a/tools/yosys
+++ b/tools/yosys
@@ -1 +1 @@
-Subproject commit 8449dd4700821ea021b241a6addaaf8ccd171dfc
+Subproject commit 9ed031ddd588442f22be13ce608547a5809b62f0