diff --git a/test/CodeGen/windows-swiftcall.c b/test/CodeGen/windows-swiftcall.c
index 5bd0d5f..c9d201a 100644
--- a/test/CodeGen/windows-swiftcall.c
+++ b/test/CodeGen/windows-swiftcall.c
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -triple x86_64-unknown-windows -emit-llvm -o - %s | FileCheck %s
+// RUN: %clang_cc1 -triple x86_64-unknown-windows -emit-llvm -target-cpu core2 -o - %s | FileCheck %s
 
 #define SWIFTCALL __attribute__((swiftcall))
 #define OUT __attribute__((swift_indirect_result))