diff --git a/m4/nc b/m4/nc
index 006f697..597459d 160000
--- a/m4/nc
+++ b/m4/nc
@@ -1 +1 @@
-Subproject commit 006f69779160a490786399b1af6a7d1e251cd15c
+Subproject commit 597459d7e6dd9d8994740a863231eac49cc9bd56