diff --git a/newlib/libc/sys/rtems/include/sys/socket.h b/newlib/libc/sys/rtems/include/sys/socket.h
index 3431947cf..d0d31a2b0 100644
--- a/newlib/libc/sys/rtems/include/sys/socket.h
+++ b/newlib/libc/sys/rtems/include/sys/socket.h
@@ -257,7 +257,8 @@ struct accept_filter_arg {
 #define	AF_IEEE80211	37		/* IEEE 802.11 protocol */
 #define	AF_INET_SDP	40		/* OFED Socket Direct Protocol ipv4 */
 #define	AF_INET6_SDP	42		/* OFED Socket Direct Protocol ipv6 */
-#define	AF_MAX		42
+#define	AF_HYPERV	43		/* HyperV sockets */
+#define	AF_MAX		43
 /*
  * When allocating a new AF_ constant, please only allocate
  * even numbered constants for FreeBSD until 134 as odd numbered AF_
@@ -265,7 +266,6 @@ struct accept_filter_arg {
  */
 #define AF_VENDOR00 39
 #define AF_VENDOR01 41
-#define AF_VENDOR02 43
 #define AF_VENDOR03 45
 #define AF_VENDOR04 47
 #define AF_VENDOR05 49