--- Libc/Libc-320/net/byteorder.3
+++ Libc/Libc-1669.40.2/net/byteorder.3
@@ -38,24 +38,31 @@
 .Sh NAME
 .Nm htonl ,
 .Nm htons ,
+.Nm htonll ,
 .Nm ntohl ,
-.Nm ntohs
+.Nm ntohs ,
+.Nm ntohll
 .Nd convert values between host and network byte order
 .Sh LIBRARY
 .Lb libc
 .Sh SYNOPSIS
 .In arpa/inet.h
+.Ft uint64_t
+.Fn htonll "uint64_t hostlonglong"
 .Ft uint32_t
 .Fn htonl "uint32_t hostlong"
 .Ft uint16_t
 .Fn htons "uint16_t hostshort"
+.Ft uint64_t
+.Fn ntohll "uint64_t netlonglong"
 .Ft uint32_t
 .Fn ntohl "uint32_t netlong"
 .Ft uint16_t
 .Fn ntohs "uint16_t netshort"
 .Sh DESCRIPTION
-These routines convert 16 and 32 bit quantities between network
+These routines convert 16 bit, 32 bit, and 64 bit quantities between network
 byte order and host byte order.
+(Network byte order is big endian, or most significant byte first.)
 On machines which have a byte order which is the same as the network
 order, routines are defined as null macros.
 .Pp
@@ -70,13 +77,27 @@
 .Sh STANDARDS
 The
 .Nm byteorder
-functions are expected to conform with IEEE Std POSIX.1-200x
-.Pq Dq POSIX.1 .
+functions except
+.Nm htonll
+and
+.Nm ntohll
+are expected to conform with IEEE Std POSIX.1-200x
+.Pq Dq POSIX.1
 .Sh HISTORY
 The
-.Nm byteorder
-functions appeared in
+functions
+.Nm htonl,
+.Nm htons,
+.Nm ntohl,
+.Nm ntohs
+appeared in
 .Bx 4.2 .
+.Pp
+The functions
+.Nm htonll
+and
+.Nm ntohll
+first appeared in OS X 10.10 (Yosemite).
 .Sh BUGS
 On the
 .Tn VAX