2 files changed, 2 insertions, 5 deletions

diff --git a/lib/libc/string/strxfrm.3 b/lib/libc/string/strxfrm.3
index e3efbd835a043..9cd584e72ec65 100644
--- a/lib/libc/string/strxfrm.3
+++ b/lib/libc/string/strxfrm.3
@@ -47,7 +47,7 @@
 .Sh SYNOPSIS
 .In string.h
 .Ft size_t
-.Fn strxfrm "char *dst" "const char *src" "size_t n"
+.Fn strxfrm "char *restrict dst" "const char *restrict src" "size_t n"
 .Sh DESCRIPTION
 The
 .Fn strxfrm
diff --git a/lib/libc/string/strxfrm.c b/lib/libc/string/strxfrm.c
index d19bdffd31e35..3e57a3c7fd979 100644
--- a/lib/libc/string/strxfrm.c
+++ b/lib/libc/string/strxfrm.c
@@ -33,10 +33,7 @@ __FBSDID("$FreeBSD$");
 #include "collate.h"
 
 size_t
-strxfrm(dest, src, len)
-	char *dest;
-	const char *src;
-	size_t len;
+strxfrm(char *__restrict dest, const char *__restrict src, size_t len)
 {
 	int prim, sec, l;
 	size_t slen;