--- lldpd-1.0.18/src/compat/compat.h.orig
+++ lldpd-1.0.18/src/compat/compat.h
@@ -90,4 +90,8 @@
 void *realloc(void *ptr, size_t size);
 #endif
 
+/* illumos does not provide these macros */
+#define	ETHER_ADDR_LEN	6
+#define	ETHER_MAX_LEN	1518
+
 #endif
--- lldpd-1.0.18/src/daemon/lldpd.h.orig
+++ lldpd-1.0.18/src/daemon/lldpd.h
@@ -36,6 +36,8 @@
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <net/if_arp.h>
+/* To get struct ifnet needed in netinet/if_ether.h */
+#include <net/if.h>
 #include <netinet/if_ether.h>
 #include <sys/un.h>
 
--- lldpd-1.0.18/tests/check-compat.h.orig
+++ lldpd-1.0.18/tests/check-compat.h
@@ -13,4 +13,8 @@
     } while (0)
 #endif
 
+/* illumos does not provide these macros */
+#define	ETHER_ADDR_LEN	6
+#define	ETHER_TYPE_LEN	2
+
 #endif