diff --git a/third_party/pigweed b/third_party/pigweed
index 6ac2d4b..ad9855c 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 6ac2d4b370be1eef6bbc1fa0b5951fc60df04af9
+Subproject commit ad9855ce2a6b9ef0e5e848d1a772689e69bb9690