diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c
--- a/sys/netinet/tcp_input.c
+++ b/sys/netinet/tcp_input.c
@@ -1192,11 +1192,10 @@
 		if (thflags & TH_ACK) {
 			if ((s = tcp_log_addrs(&inc, th, NULL, NULL)))
 				log(LOG_DEBUG, "%s; %s: Listen socket: "
-				    "SYN|ACK invalid, segment rejected\n",
+				    "SYN|ACK invalid, segment ignored\n",
 				    s, __func__);
-			syncache_badack(&inc, port);	/* XXX: Not needed! */
 			TCPSTAT_INC(tcps_badsyn);
-			goto dropwithreset;
+			goto dropunlock;
 		}
 		/*
 		 * If the drop_synfin option is enabled, drop all
diff --git a/sys/netinet/tcp_syncache.h b/sys/netinet/tcp_syncache.h
--- a/sys/netinet/tcp_syncache.h
+++ b/sys/netinet/tcp_syncache.h
@@ -45,7 +45,6 @@
 	     void *, void *, uint8_t, uint16_t);
 void	 syncache_chkrst(struct in_conninfo *, struct tcphdr *, struct mbuf *,
 	     uint16_t);
-void	 syncache_badack(struct in_conninfo *, uint16_t);
 int	 syncache_pcblist(struct sysctl_req *);
 
 struct syncache {
diff --git a/sys/netinet/tcp_syncache.c b/sys/netinet/tcp_syncache.c
--- a/sys/netinet/tcp_syncache.c
+++ b/sys/netinet/tcp_syncache.c
@@ -712,23 +712,6 @@
 	SCH_UNLOCK(sch);
 }
 
-void
-syncache_badack(struct in_conninfo *inc, uint16_t port)
-{
-	struct syncache *sc;
-	struct syncache_head *sch;
-
-	if (syncache_cookiesonly())
-		return;
-	sc = syncache_lookup(inc, &sch);	/* returns locked sch */
-	SCH_LOCK_ASSERT(sch);
-	if ((sc != NULL) && (sc->sc_port == port)) {
-		syncache_drop(sc, sch);
-		TCPSTAT_INC(tcps_sc_badack);
-	}
-	SCH_UNLOCK(sch);
-}
-
 void
 syncache_unreach(struct in_conninfo *inc, tcp_seq th_seq, uint16_t port)
 {