diff --git a/clang/test/SemaCXX/PR51712-large-array-constexpr-check-oom.cpp b/clang/test/SemaCXX/PR51712-large-array-constexpr-check-oom.cpp
--- a/clang/test/SemaCXX/PR51712-large-array-constexpr-check-oom.cpp
+++ b/clang/test/SemaCXX/PR51712-large-array-constexpr-check-oom.cpp
@@ -1,7 +1,7 @@
 // REQUIRES: shell
 // UNSUPPORTED: win32
 // RUN: ulimit -v 1048576
-// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
+// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify -triple=x86_64 %s
 // expected-no-diagnostics
 
 // This used to require too much memory and crash with OOM.