5 files changed, 8 insertions, 8 deletions
diff --git a/lib/libc/stdio/fprintf.c b/lib/libc/stdio/fprintf.c
index 55ae1d5daef4..4232cc70e004 100644
--- a/lib/libc/stdio/fprintf.c
+++ b/lib/libc/stdio/fprintf.c
@@ -44,7 +44,7 @@ __FBSDID("$FreeBSD$");
 #include <stdarg.h>
 
 int
-fprintf(FILE *fp, const char *fmt, ...)
+fprintf(FILE *__restrict fp, const char *__restrict fmt, ...)
 {
 	int ret;
 	va_list ap;
diff --git a/lib/libc/stdio/printf.3 b/lib/libc/stdio/printf.3
index ca9aae2d9255..9a285a49caee 100644
--- a/lib/libc/stdio/printf.3
+++ b/lib/libc/stdio/printf.3
@@ -48,13 +48,13 @@
 .Sh SYNOPSIS
 .In stdio.h
 .Ft int
-.Fn printf "const char *format" ...
+.Fn printf "const char *restrict format" ...
 .Ft int
-.Fn fprintf "FILE *stream" "const char *format" ...
+.Fn fprintf "FILE *restrict stream" "const char *restrict format" ...
 .Ft int
-.Fn sprintf "char *str" "const char *format" ...
+.Fn sprintf "char *restrict str" "const char *restrict format" ...
 .Ft int
-.Fn snprintf "char *str" "size_t size" "const char *format" ...
+.Fn snprintf "char *restrict str" "size_t size" "const char *restrict format" ...
 .Ft int
 .Fn asprintf "char **ret" "const char *format" ...
 .In stdarg.h
diff --git a/lib/libc/stdio/printf.c b/lib/libc/stdio/printf.c
index bd7d16c0bea5..1aa276783a13 100644
--- a/lib/libc/stdio/printf.c
+++ b/lib/libc/stdio/printf.c
@@ -44,7 +44,7 @@ __FBSDID("$FreeBSD$");
 #include <stdarg.h>
 
 int
-printf(char const *fmt, ...)
+printf(char const *__restrict fmt, ...)
 {
 	int ret;
 	va_list ap;
diff --git a/lib/libc/stdio/snprintf.c b/lib/libc/stdio/snprintf.c
index e4cc7fcfea4e..c053ec92e2a7 100644
--- a/lib/libc/stdio/snprintf.c
+++ b/lib/libc/stdio/snprintf.c
@@ -47,7 +47,7 @@ __FBSDID("$FreeBSD$");
 #include "local.h"
 
 int
-snprintf(char *str, size_t n, char const *fmt, ...)
+snprintf(char *__restrict str, size_t n, char const *__restrict fmt, ...)
 {
 	size_t on;
 	int ret;
diff --git a/lib/libc/stdio/sprintf.c b/lib/libc/stdio/sprintf.c
index e2511d64f8b3..71279baaf9ad 100644
--- a/lib/libc/stdio/sprintf.c
+++ b/lib/libc/stdio/sprintf.c
@@ -46,7 +46,7 @@ __FBSDID("$FreeBSD$");
 #include "local.h"
 
 int
-sprintf(char *str, char const *fmt, ...)
+sprintf(char *__restrict str, char const *__restrict fmt, ...)
 {
 	int ret;
 	va_list ap;