diff --git a/sys/netinet/tcp_usrreq.c b/sys/netinet/tcp_usrreq.c
--- a/sys/netinet/tcp_usrreq.c
+++ b/sys/netinet/tcp_usrreq.c
@@ -523,7 +523,7 @@
 	}
 	if ((error = prison_remote_ip4(td->td_ucred, &sinp->sin_addr)) != 0)
 		goto out;
-	if (SOLISTENING(so) || so->so_options & SO_REUSEPORT_LB) {
+	if (SOLISTENING(so)) {
 		error = EOPNOTSUPP;
 		goto out;
 	}
@@ -590,7 +590,7 @@
 		error = EAFNOSUPPORT;
 		goto out;
 	}
-	if (SOLISTENING(so) || so->so_options & SO_REUSEPORT_LB) {
+	if (SOLISTENING(so)) {
 		error = EOPNOTSUPP;
 		goto out;
 	}
@@ -1478,6 +1478,8 @@
 	    (SS_ISCONNECTING | SS_ISCONNECTED | SS_ISDISCONNECTING |
 	    SS_ISDISCONNECTED)) != 0))
 		return (EISCONN);
+	if (__predict_false((so->so_options & SO_REUSEPORT_LB) != 0))
+		return (EOPNOTSUPP);
 
 	INP_HASH_WLOCK(&V_tcbinfo);
 	error = in_pcbconnect(inp, sin, td->td_ucred);
@@ -1520,6 +1522,8 @@
 	if (__predict_false((so->so_state &
 	    (SS_ISCONNECTING | SS_ISCONNECTED)) != 0))
 		return (EISCONN);
+	if (__predict_false((so->so_options & SO_REUSEPORT_LB) != 0))
+		return (EOPNOTSUPP);
 
 	INP_HASH_WLOCK(&V_tcbinfo);
 	error = in6_pcbconnect(inp, sin6, td->td_ucred, true);
diff --git a/tests/sys/netinet/so_reuseport_lb_test.c b/tests/sys/netinet/so_reuseport_lb_test.c
--- a/tests/sys/netinet/so_reuseport_lb_test.c
+++ b/tests/sys/netinet/so_reuseport_lb_test.c
@@ -505,6 +505,11 @@
 	ATF_REQUIRE_MSG(rv == -1 && errno == EOPNOTSUPP,
 	    "Expected EOPNOTSUPP on connect(2) not met. Got %d, errno %d",
 	    rv, errno);
+	rv = sendto(s, "test", 4, 0, (struct sockaddr *)&sin,
+	    sizeof(sin));
+	ATF_REQUIRE_MSG(rv == -1 && errno == EOPNOTSUPP,
+	    "Expected EOPNOTSUPP on sendto(2) not met. Got %d, errno %d",
+	    rv, errno);
 
 	close(p);
 	close(s);
@@ -536,6 +541,11 @@
 	ATF_REQUIRE_MSG(rv == -1 && errno == EOPNOTSUPP,
 	    "Expected EOPNOTSUPP on connect(2) not met. Got %d, errno %d",
 	    rv, errno);
+	rv = sendto(s, "test", 4, 0, (struct sockaddr *)&sin,
+	    sizeof(sin));
+	ATF_REQUIRE_MSG(rv == -1 && errno == EOPNOTSUPP,
+	    "Expected EOPNOTSUPP on sendto(2) not met. Got %d, errno %d",
+	    rv, errno);
 
 	close(p);
 	close(s);