diff --git a/m4 b/m4
index b3dea05e..541d6079 160000
--- a/m4
+++ b/m4
@@ -1 +1 @@
-Subproject commit b3dea05e6a626729b67f5803159b0f865f518949
+Subproject commit 541d6079634c420ea757687715580fa199a0e3f0