some systems lack SO_REUSEPORT
diff --git a/regress/netcat.c b/regress/netcat.c
index c14d816..bffaade 100644
--- a/regress/netcat.c
+++ b/regress/netcat.c
@@ -719,11 +719,11 @@
 		    &rtableid, sizeof(rtableid)) == -1))
 			err(1, "setsockopt SO_RTABLE");
 #endif
-
+#ifdef SO_REUSEPORT
 		ret = setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &x, sizeof(x));
 		if (ret == -1)
 			err(1, NULL);
-
+#endif
 		set_common_sockopts(s);
 
 		if (bind(s, (struct sockaddr *)res0->ai_addr,