diff --git a/m4 b/m4
index f662e3a..c617eee 160000
--- a/m4
+++ b/m4
@@ -1 +1 @@
-Subproject commit f662e3a93ebdec3d1c9374382dcc070093a42fed
+Subproject commit c617eee22ae5c285e79e81ec39ce96862fd3262f