diff --git a/ospfd/ospf_packet.c b/ospfd/ospf_packet.c
index 528e8d3..1f8ecd4 100644
--- a/ospfd/ospf_packet.c
+++ b/ospfd/ospf_packet.c
@@ -2018,8 +2018,12 @@
       pktinfo = (struct in_pktinfo *)CMSG_DATA(cmsg);
       ifindex = pktinfo->ipi_ifindex;
 #elif defined (IP_RECVIF)
+#ifdef SUNOS_5
+      ifindex = *(uint_t *)CMSG_DATA(cmsg);
+#else
       pktinfo = (struct sockaddr_dl *)CMSG_DATA(cmsg);
       ifindex = pktinfo->sdl_index;
+#endif /* SUNOS_5 */
 #else
       ifindex = 0;
 #endif