diff --git a/lib/libclang_rt/Makefile b/lib/libclang_rt/Makefile
index b3381050a0d5..cda97b74258f 100644
--- a/lib/libclang_rt/Makefile
+++ b/lib/libclang_rt/Makefile
@@ -6,8 +6,10 @@ SUBDIR+=	asan
 SUBDIR+=	asan-preinit
 SUBDIR+=	asan_cxx
 SUBDIR+=	asan_dynamic
+.if ${MACHINE_CPUARCH} == "amd64"
 SUBDIR+=	msan
 SUBDIR+=	msan_cxx
+.endif
 SUBDIR+=	safestack
 SUBDIR+=	stats
 SUBDIR+=	stats_client