diff --git a/third_party/tools/yosys b/third_party/tools/yosys
index 7a362f1f7496..8fd40942e9bd 160000
--- a/third_party/tools/yosys
+++ b/third_party/tools/yosys
@@ -1 +1 @@
-Subproject commit 7a362f1f7496be9ece7cabd852dc0e2b5b64e91c
+Subproject commit 8fd40942e9bdf343c7cdfd926f2558f75d755652