3 files changed, 3 insertions, 10 deletions

diff --git a/sys/libkern/strcat.c b/sys/libkern/strcat.c
index e517c08fff349..2117be15dbf6a 100644
--- a/sys/libkern/strcat.c
+++ b/sys/libkern/strcat.c
@@ -36,9 +36,7 @@
 #include <sys/libkern.h>
 
 char *
-strcat(s, append)
-	register char *s;
-	register const char *append;
+strcat(char * __restrict s, const char * __restrict append)
 {
 	char *save = s;
 
diff --git a/sys/libkern/strcpy.c b/sys/libkern/strcpy.c
index 3aed2d0a30eb1..dd25c608b6601 100644
--- a/sys/libkern/strcpy.c
+++ b/sys/libkern/strcpy.c
@@ -36,9 +36,7 @@
 #include <sys/libkern.h>
 
 char *
-strcpy(to, from)
-	register char *to;
-	register const char *from;
+strcpy(char * __restrict to, const char * __restrict from)
 {
 	char *save = to;
 
diff --git a/sys/libkern/strncpy.c b/sys/libkern/strncpy.c
index a8b51a77bfc29..07039c352b12a 100644
--- a/sys/libkern/strncpy.c
+++ b/sys/libkern/strncpy.c
@@ -43,10 +43,7 @@
  * Return dst.
  */
 char *
-strncpy(dst, src, n)
-	char *dst;
-	const char *src;
-	register size_t n;
+strncpy(char * __restrict dst, const char * __restrict src, size_t n)
 {
 	if (n != 0) {
 		register char *d = dst;