--- src/svc_dg.c.orig	2024-10-17 15:50:55.000000000 +0800
+++ src/svc_dg.c	2025-04-22 19:12:12.000000000 +0800
@@ -656,10 +656,12 @@
 	int val = 1;
 
 	switch (si->si_af) {
+#if defined(AF_INET) && defined(IP_PKTINFO)
 	case AF_INET:
 		(void) setsockopt(fd, SOL_IP, IP_PKTINFO, &val, sizeof(val));
 		break;
-#ifdef INET6
+#endif
+#if defined(INET6) && defined(IPV6_RECVPKTINFO)
 	case AF_INET6:
 		(void) setsockopt(fd, SOL_IPV6, IPV6_RECVPKTINFO, &val, sizeof(val));
 		break;
@@ -688,6 +690,7 @@
 		return 0;
 
 	switch (((struct sockaddr *) msg->msg_name)->sa_family) {
+#if defined(AF_INET) && defined(IP_PKTINFO)
 	case AF_INET:
 		if (cmsg->cmsg_level != SOL_IP
 		 || cmsg->cmsg_type != IP_PKTINFO
@@ -700,8 +703,8 @@
 			pkti->ipi_ifindex = 0;
 		}
 		break;
-
-#ifdef INET6
+#endif
+#if defined(INET6) && defined(IPV6_PKTINFO)
 	case AF_INET6:
 		if (cmsg->cmsg_level != SOL_IPV6
 		 || cmsg->cmsg_type != IPV6_PKTINFO