Index: lib/msan/tests/msan_test.cc
===================================================================
--- lib/msan/tests/msan_test.cc
+++ lib/msan/tests/msan_test.cc
@@ -72,6 +72,7 @@
 # include <mntent.h>
 # include <netinet/ether.h>
 #else
+# include <signal.h>
 # include <netinet/in.h>
 # include <sys/uio.h>
 # include <sys/mount.h>