diff --git a/compiler-rt/test/msan/Linux/signal_mcontext2.cpp b/compiler-rt/test/msan/Linux/signal_mcontext2.cpp
--- a/compiler-rt/test/msan/Linux/signal_mcontext2.cpp
+++ b/compiler-rt/test/msan/Linux/signal_mcontext2.cpp
@@ -1,5 +1,7 @@
 // RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -O1 %s -o %t && not %run %t 2>&1 | FileCheck %s
 
+// REQUIRES: x86_64-target-arch
+
 #include <pthread.h>
 #include <signal.h>
 #include <ucontext.h>