diff --git a/yosys b/yosys
index 0200a7680..66734f522 160000
--- a/yosys
+++ b/yosys
@@ -1 +1 @@
-Subproject commit 0200a7680a2d012e7737b01f07ec354b1bddf602
+Subproject commit 66734f522dd7b7cc0f7f2b6be876c0366271c9ec