diff --git a/llvm/unittests/Support/Host.cpp b/llvm/unittests/Support/Host.cpp
index 934a604954272..fdeed87812870 100644
--- a/llvm/unittests/Support/Host.cpp
+++ b/llvm/unittests/Support/Host.cpp
@@ -35,6 +35,7 @@ class HostTest : public testing::Test {
     // x86_64 Linux and Darwin.
     SupportedArchAndOSs.push_back(std::make_pair(Triple::x86_64, Triple::Linux));
     SupportedArchAndOSs.push_back(std::make_pair(Triple::x86_64, Triple::Darwin));
+    SupportedArchAndOSs.push_back(std::make_pair(Triple::x86_64, Triple::MacOSX));
   }
 };