diff --git a/usr.bin/kdump/mkioctls b/usr.bin/kdump/mkioctls
index 413a8d27e3a..b8e4451e07f 100644
--- a/usr.bin/kdump/mkioctls
+++ b/usr.bin/kdump/mkioctls
@@ -38,6 +38,7 @@ BEGIN {
 	print "#include <sys/socket.h>"
 	print "#include <sys/time.h>"
 	print "#include <sys/tty.h>"
+	print "#include <net/ethernet.h>"
 	print "#include <net/if.h>"
 	print "#include <net/if_var.h>"
 	print "#include <net/route.h>"