--- Libc/Libc-825.26/stdlib/NetBSD/strfmon.c
+++ Libc/Libc-997.90.3/stdlib/NetBSD/strfmon.c
@@ -483,7 +483,7 @@
 }
 
 static int
-get_groups(int size, char *grouping) {
+get_groups(int size, const char *grouping) {
 
 	int	chars = 0;
 
@@ -522,7 +522,7 @@
 
 	int		padded;
 
-	char		*grouping;
+	const char	*grouping;
 	char		decimal_point;
 	char		thousands_sep;