diff --git a/sys/netinet/tcp_debug.c b/sys/netinet/tcp_debug.c
index 89e9d7cbc94a..531d894453f7 100644
--- a/sys/netinet/tcp_debug.c
+++ b/sys/netinet/tcp_debug.c
@@ -55,6 +55,7 @@
 #include <sys/protosw.h>
 #include <sys/socket.h>
 
+#include <net/route.h>
 #include <netinet/in.h>
 #include <netinet/in_systm.h>
 #include <netinet/ip.h>
diff --git a/sys/netinet/tcp_syncache.c b/sys/netinet/tcp_syncache.c
index d6ce983adfc8..bf6432bf69f7 100644
--- a/sys/netinet/tcp_syncache.c
+++ b/sys/netinet/tcp_syncache.c
@@ -900,7 +900,10 @@ syncache_add(inc, to, th, sop, m)
 		sc->sc_route.ro_rt = NULL;
 	}
 	sc->sc_irs = th->th_seq;
-	sc->sc_iss = syncookie_generate(sc);
+	if (tcp_syncookies)
+		sc->sc_iss = syncookie_generate(sc);
+	else
+		sc->sc_iss = arc4random();
 
 	/* Initial receive window: clip sbspace to [0 .. TCP_MAXWIN] */
 	win = sbspace(&so->so_rcv);