diff --git a/nulllib b/nulllib
index 8a1d772..b891cf1 160000
--- a/nulllib
+++ b/nulllib
@@ -1 +1 @@
-Subproject commit 8a1d772bb48d6c2b0fdecea59ae102615b489992
+Subproject commit b891cf1efce1f68b1be09063e4cb83af5ac8a180