$FabBSD$
--- agent/mibgroup/mibII/at.c.orig	Mon Jun 11 11:15:38 2018
+++ agent/mibgroup/mibII/at.c	Mon Jun 11 11:21:06 2018
@@ -847,7 +847,9 @@ ARP_Scan_Next(in_addr_t * IPAddr, char *PhysAddr, int 
 #endif
             memcpy(PhysAddr, (char *) LLADDR(sdl), sdl->sdl_alen);
             *PhysAddrLen = sdl->sdl_alen;
+#ifdef ARP_SCAN_FOUR_ARGUMENTS
             *ifIndex = sdl->sdl_index;
+#endif
             *ifType = 1;        /* XXX */
             return (1);
         }