diff --git a/include/arpa/inet.h b/include/arpa/inet.h
index d16fd1fbde15..ecfcb4922062 100644
--- a/include/arpa/inet.h
+++ b/include/arpa/inet.h
@@ -139,8 +139,9 @@ uint16_t	 ntohs(uint16_t);
 
 in_addr_t	 inet_addr(const char *);
 char		*inet_ntoa(struct in_addr);
-const char	*inet_ntop(int, const void *, char *, socklen_t);
-int		 inet_pton(int, const char *, void *);
+const char	*inet_ntop(int, const void *__restrict, char *__restrict,
+		     socklen_t);
+int		 inet_pton(int, const char *__restrict, void *__restrict);
 
 #if __BSD_VISIBLE
 int		 ascii2addr(int, const char *, void *);
diff --git a/lib/libc/net/inet.3 b/lib/libc/net/inet.3
index ff603fdc6937..c3208772ffab 100644
--- a/lib/libc/net/inet.3
+++ b/lib/libc/net/inet.3
@@ -62,9 +62,9 @@
 .Ft char *
 .Fn inet_ntoa "struct in_addr in"
 .Ft const char *
-.Fn inet_ntop "int af" "const void *src" "char *dst" "socklen_t size"
+.Fn inet_ntop "int af" "const void *restrict src" "char *restrict dst" "socklen_t size"
 .Ft int
-.Fn inet_pton "int af" "const char *src" "void *dst"
+.Fn inet_pton "int af" "const char *restrict src" "void *restrict dst"
 .Ft struct in_addr
 .Fn inet_makeaddr "in_addr_t net" "in_addr_t lna"
 .Ft in_addr_t
diff --git a/lib/libc/net/inet_ntop.c b/lib/libc/net/inet_ntop.c
index 2a84662567e7..534c968c5bad 100644
--- a/lib/libc/net/inet_ntop.c
+++ b/lib/libc/net/inet_ntop.c
@@ -49,11 +49,8 @@ static const char *inet_ntop6(const u_char *src, char *dst, socklen_t size);
  *	Paul Vixie, 1996.
  */
 const char *
-inet_ntop(af, src, dst, size)
-	int af;
-	const void *src;
-	char *dst;
-	socklen_t size;
+inet_ntop(int af, const void *__restrict src, char *__restrict dst,
+    socklen_t size)
 {
 	switch (af) {
 	case AF_INET:
@@ -79,10 +76,7 @@ inet_ntop(af, src, dst, size)
  *	Paul Vixie, 1996.
  */
 static const char *
-inet_ntop4(src, dst, size)
-	const u_char *src;
-	char *dst;
-	socklen_t size;
+inet_ntop4(const u_char *src, char *dst, socklen_t size)
 {
 	static const char fmt[] = "%u.%u.%u.%u";
 	char tmp[sizeof "255.255.255.255"];
@@ -102,10 +96,7 @@ inet_ntop4(src, dst, size)
  *	Paul Vixie, 1996.
  */
 static const char *
-inet_ntop6(src, dst, size)
-	const u_char *src;
-	char *dst;
-	socklen_t size;
+inet_ntop6(const u_char *src, char *dst, socklen_t size)
 {
 	/*
 	 * Note that int32_t and int16_t need only be "at least" large enough
diff --git a/lib/libc/net/inet_pton.c b/lib/libc/net/inet_pton.c
index 05bb1f4b257c..b29e3e231aa9 100644
--- a/lib/libc/net/inet_pton.c
+++ b/lib/libc/net/inet_pton.c
@@ -48,10 +48,7 @@ static int	inet_pton6(const char *src, u_char *dst);
  *	Paul Vixie, 1996.
  */
 int
-inet_pton(af, src, dst)
-	int af;
-	const char *src;
-	void *dst;
+inet_pton(int af, const char *__restrict src, void *__restrict dst)
 {
 	switch (af) {
 	case AF_INET:
@@ -76,9 +73,7 @@ inet_pton(af, src, dst)
  *	Paul Vixie, 1996.
  */
 static int
-inet_pton4(src, dst)
-	const char *src;
-	u_char *dst;
+inet_pton4(const char *src, u_char *dst)
 {
 	static const char digits[] = "0123456789";
 	int saw_digit, octets, ch;
@@ -130,9 +125,7 @@ inet_pton4(src, dst)
  *	Paul Vixie, 1996.
  */
 static int
-inet_pton6(src, dst)
-	const char *src;
-	u_char *dst;
+inet_pton6(const char *src, u_char *dst)
 {
 	static const char xdigits_l[] = "0123456789abcdef",
 			  xdigits_u[] = "0123456789ABCDEF";