diff --git a/m4 b/m4
index f2b2f3b21..230983ede 160000
--- a/m4
+++ b/m4
@@ -1 +1 @@
-Subproject commit f2b2f3b21db9175aa3de73031b8c22e711065848
+Subproject commit 230983edee3f18d9a5e975608b6374751d024f75