diff --git a/m4 b/m4
index 230983ede..e490e14fb 160000
--- a/m4
+++ b/m4
@@ -1 +1 @@
-Subproject commit 230983edee3f18d9a5e975608b6374751d024f75
+Subproject commit e490e14fb13595428d39055304bcf0ee7ab94806