diff --git a/m4 b/m4
index b7c7676b..3fe661bb 160000
--- a/m4
+++ b/m4
@@ -1 +1 @@
-Subproject commit b7c7676b3056f0e38b593ef494e2202db3936b13
+Subproject commit 3fe661bb36481dd02d4f43058ca3ee9174e1e85f