Index: sys/net/pfkeyv2.h
===================================================================
--- sys/net/pfkeyv2.h
+++ sys/net/pfkeyv2.h
@@ -85,7 +85,6 @@
   u_int8_t sadb_msg_errno;
   u_int8_t sadb_msg_satype;
   u_int16_t sadb_msg_len;
-  u_int16_t sadb_msg_reserved;
   u_int32_t sadb_msg_seq;
   u_int32_t sadb_msg_pid;
 };
Index: sys/netipsec/key.c
===================================================================
--- sys/netipsec/key.c
+++ sys/netipsec/key.c
@@ -663,7 +663,7 @@
 static struct mbuf *key_setdumpsa(struct secasvar *, u_int8_t,
 	u_int8_t, u_int32_t, u_int32_t);
 static struct mbuf *key_setsadbmsg(u_int8_t, u_int16_t, u_int8_t,
-	u_int32_t, pid_t, u_int16_t);
+	u_int32_t, pid_t);
 static struct mbuf *key_setsadbsa(struct secasvar *);
 static struct mbuf *key_setsadbaddr(u_int16_t,
 	const struct sockaddr *, u_int8_t, u_int16_t);
@@ -2481,7 +2481,7 @@
 	}
 
 	/* create new sadb_msg to reply. */
-	m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0, 0);
+	m = key_setsadbmsg(SADB_X_SPDACQUIRE, 0, 0, 0, 0);
 	if (!m)
 		return ENOBUFS;
 
@@ -2656,7 +2656,7 @@
 	struct mbuf *result = NULL, *m;
 	struct seclifetime lt;
 
-	m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid, sp->refcnt);
+	m = key_setsadbmsg(type, 0, SADB_SATYPE_UNSPEC, seq, pid);
 	if (!m)
 		goto fail;
 	result = m;
@@ -2766,7 +2766,7 @@
 	KEYDBG(KEY_DATA, kdebug_secpolicy(sp));
 
 	/* set msg header */
-	m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0, 0);
+	m = key_setsadbmsg(SADB_X_SPDEXPIRE, 0, 0, 0, 0);
 	if (!m) {
 		error = ENOBUFS;
 		goto fail;
@@ -3585,7 +3585,7 @@
 
 	SECASVAR_RLOCK_TRACKER;
 
-	m = key_setsadbmsg(type, 0, satype, seq, pid, sav->refcnt);
+	m = key_setsadbmsg(type, 0, satype, seq, pid);
 	if (m == NULL)
 		goto fail;
 	result = m;
@@ -3773,7 +3773,7 @@
  */
 static struct mbuf *
 key_setsadbmsg(u_int8_t type, u_int16_t tlen, u_int8_t satype, u_int32_t seq,
-    pid_t pid, u_int16_t reserved)
+    pid_t pid)
 {
 	struct mbuf *m;
 	struct sadb_msg *p;
@@ -3802,7 +3802,6 @@
 	p->sadb_msg_errno = 0;
 	p->sadb_msg_satype = satype;
 	p->sadb_msg_len = PFKEY_UNIT64(tlen);
-	p->sadb_msg_reserved = reserved;
 	p->sadb_msg_seq = seq;
 	p->sadb_msg_pid = (u_int32_t)pid;
 
@@ -6610,7 +6609,7 @@
 	if (seq == 0)
 		return (error);
 
-	m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0, 0);
+	m = key_setsadbmsg(SADB_ACQUIRE, 0, satype, seq, 0);
 	if (!m) {
 		error = ENOBUFS;
 		goto fail;
@@ -7326,7 +7325,7 @@
 	/* set msg header */
 	satype = key_proto2satype(sav->sah->saidx.proto);
 	IPSEC_ASSERT(satype != 0, ("invalid proto, satype %u", satype));
-	m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0, sav->refcnt);
+	m = key_setsadbmsg(SADB_EXPIRE, 0, satype, sav->seq, 0);
 	if (!m) {
 		error = ENOBUFS;
 		goto fail;
Index: sys/netipsec/key_debug.c
===================================================================
--- sys/netipsec/key_debug.c
+++ sys/netipsec/key_debug.c
@@ -178,9 +178,9 @@
 	    base->sadb_msg_version, base->sadb_msg_type,
 	    kdebug_sadb_type(base->sadb_msg_type),
 	    base->sadb_msg_errno, base->sadb_msg_satype);
-	printf("  len=%u reserved=%u seq=%u pid=%u\n",
-	    base->sadb_msg_len, base->sadb_msg_reserved,
-	    base->sadb_msg_seq, base->sadb_msg_pid);
+	printf("  len=%u seq=%u pid=%u\n",
+	    base->sadb_msg_len, base->sadb_msg_seq,
+	    base->sadb_msg_pid);
 
 	tlen = PFKEY_UNUNIT64(base->sadb_msg_len) - sizeof(struct sadb_msg);
 	ext = (struct sadb_ext *)((caddr_t)base + sizeof(struct sadb_msg));