3 files changed, 3 insertions, 3 deletions

diff --git a/lib/libutil/expand_number.3 b/lib/libutil/expand_number.3
index 92e8961c58fc..23e488d3acda 100644
--- a/lib/libutil/expand_number.3
+++ b/lib/libutil/expand_number.3
@@ -37,7 +37,7 @@
 .In libutil.h
 .Ft int
 .Fo expand_number
-.Fa "char *buf" "int64_t *num"
+.Fa "const char *buf" "int64_t *num"
 .Fc
 .Sh DESCRIPTION
 The
diff --git a/lib/libutil/expand_number.c b/lib/libutil/expand_number.c
index 5cc260820bb2..0f896eedadc2 100644
--- a/lib/libutil/expand_number.c
+++ b/lib/libutil/expand_number.c
@@ -46,7 +46,7 @@ __FBSDID("$FreeBSD$");
  *	8) A positive decimal number followed by a 'e' or 'E' (mult by 1 << 60).
  */
 int
-expand_number(char *buf, int64_t *num)
+expand_number(const char *buf, int64_t *num)
 {
 	static const char unit[] = "bkmgtpe";
 	char *endptr, s;
diff --git a/lib/libutil/libutil.h b/lib/libutil/libutil.h
index 1df951036189..aa663a72c440 100644
--- a/lib/libutil/libutil.h
+++ b/lib/libutil/libutil.h
@@ -82,7 +82,7 @@ int	forkpty(int *_amaster, char *_name,
 		     struct termios *_termp, struct winsize *_winp);
 int	humanize_number(char *_buf, size_t _len, int64_t _number,
 	    const char *_suffix, int _scale, int _flags);
-int	expand_number(char *_buf, int64_t *_num);
+int	expand_number(const char *_buf, int64_t *_num);
 const char *uu_lockerr(int _uu_lockresult);
 int	uu_lock(const char *_ttyname);
 int	uu_unlock(const char *_ttyname);