diff --git a/contrib/netcat/netcat.c b/contrib/netcat/netcat.c
index efbe9bb9bbd..4bd808862c0 100644
--- a/contrib/netcat/netcat.c
+++ b/contrib/netcat/netcat.c
@@ -46,6 +46,7 @@
 #include <netipsec/ipsec.h>
 #endif
 #include <netinet/tcp.h>
+#include "../../sys/netinet/cc/cc_newreno.h"
 #include <netinet/ip.h>
 #include <arpa/telnet.h>
 
@@ -100,6 +101,8 @@ int	zflag;					/* Port Scan Flag */
 int	Dflag;					/* sodebug */
 int	Iflag;					/* TCP receive buffer size */
 int	Oflag;					/* TCP send buffer size */
+int	Aflag;					/* TCP abe ecn */
+int	aflag;					/* TCP abe loos */
 int	Sflag;					/* TCP MD5 signature option */
 int	Tflag = -1;				/* IP Type of Service */
 int	rtableid = -1;
@@ -167,7 +170,7 @@ main(int argc, char *argv[])
 	signal(SIGPIPE, SIG_IGN);
 
 	while ((ch = getopt_long(argc, argv,
-	    "46DdEe:FhI:i:klNnoO:P:p:rSs:tT:UuV:vw:X:x:z",
+	    "46DdEe:FhI:i:klNnoO:P:p:rSs:tT:UuV:vw:X:x:zA:a:",
 	    longopts, NULL)) != -1) {
 		switch (ch) {
 		case '4':
@@ -285,6 +288,18 @@ main(int argc, char *argv[])
 				errx(1, "TCP receive window %s: %s",
 				    errstr, optarg);
 			break;
+		case 'a':
+			aflag = strtonum(optarg, 0, 100, &errstr);
+			if (errstr != NULL)
+				errx(1, "TCP abe loss value %s: %s",
+				    errstr, optarg);
+			break;
+		case 'A':
+			Aflag = strtonum(optarg, 0, 100, &errstr);
+			if (errstr != NULL)
+				errx(1, "TCP abe ecn value %s: %s",
+				    errstr, optarg);
+			break;
 		case 'O':
 			Oflag = strtonum(optarg, 1, 65536 << 14, &errstr);
 			if (errstr != NULL) {
@@ -1184,6 +1199,7 @@ void
 set_common_sockopts(int s, int af)
 {
 	int x = 1;
+	struct cc_newreno_opts nrenoopts;
 
 	if (Sflag) {
 		if (setsockopt(s, IPPROTO_TCP, TCP_MD5SIG,
@@ -1224,6 +1240,20 @@ set_common_sockopts(int s, int af)
 		    &FreeBSD_Oflag, sizeof(FreeBSD_Oflag)) == -1)
 			err(1, "disable TCP options");
 	}
+	if (Aflag) {
+		nrenoopts.name = CC_NEWRENO_BETA_ECN;
+		nrenoopts.val= Aflag;
+		if (setsockopt(s, IPPROTO_TCP, TCP_CCALGOOPT,
+		    &nrenoopts, sizeof(nrenoopts)) == -1)
+			err(1, "set TCP beta ecn");
+	}
+	if (aflag) {
+		nrenoopts.name = CC_NEWRENO_BETA;
+		nrenoopts.val= aflag;
+		if (setsockopt(s, IPPROTO_TCP, TCP_CCALGOOPT,
+		    &nrenoopts, sizeof(nrenoopts)) == -1)
+			err(1, "set TCP beta loss");
+	}
 #ifdef IPSEC
 	if (ipsec_policy[0] != NULL)
 		add_ipsec_policy(s, af, ipsec_policy[0]);