Index: auxil/zeek-aux/adtrace/ethertype.h
--- auxil/zeek-aux/adtrace/ethertype.h.orig
+++ auxil/zeek-aux/adtrace/ethertype.h
@@ -33,7 +33,8 @@
  * <netinet/if_ether.h> if all it needs are ETHERTYPE_ values.
  */
 
-#include <net/ethernet.h>
+#include <net/if_arp.h>
+#include <netinet/if_ether.h>
 
 #ifndef ETHERTYPE_PUP
 #define ETHERTYPE_PUP 0x0200 /* PUP protocol */
