diff --git a/third_party/pigweed b/third_party/pigweed
index 40a9c3f..a938701 160000
--- a/third_party/pigweed
+++ b/third_party/pigweed
@@ -1 +1 @@
-Subproject commit 40a9c3f128f6a279d6aee6aef45705725689189a
+Subproject commit a938701609529906c7cef37b167ccf8ef4a2c478