Index: lib/msan/tests/msan_test.cc
===================================================================
--- lib/msan/tests/msan_test.cc
+++ lib/msan/tests/msan_test.cc
@@ -75,6 +75,7 @@
 # include <netinet/in.h>
 # include <sys/uio.h>
 # include <sys/mount.h>
+# include <net/ethernet.h>
 # define f_namelen f_namemax  // FreeBSD names this statfs field so.
 #endif