diff --git a/unittests/Support/ManagedStatic.cpp b/unittests/Support/ManagedStatic.cpp
index 8ddad38ecf1..1497f4e3408 100644
--- a/unittests/Support/ManagedStatic.cpp
+++ b/unittests/Support/ManagedStatic.cpp
@@ -19,7 +19,8 @@ using namespace llvm;
 
 namespace {
 
-#if defined(HAVE_PTHREAD_H) && !__has_feature(memory_sanitizer)
+#if LLVM_ENABLE_THREADS != 0 && defined(HAVE_PTHREAD_H) && \
+  !__has_feature(memory_sanitizer)
 namespace test1 {
   llvm::ManagedStatic<int> ms;
   void *helper(void*) {
diff --git a/utils/unittest/CMakeLists.txt b/utils/unittest/CMakeLists.txt
index 70ed35df2e6..8bdfee15c19 100644
--- a/utils/unittest/CMakeLists.txt
+++ b/utils/unittest/CMakeLists.txt
@@ -27,6 +27,10 @@ endif()
 set(LLVM_REQUIRES_RTTI 1)
 add_definitions( -DGTEST_HAS_RTTI=0 )
 
+if (NOT LLVM_ENABLE_THREADS)
+  add_definitions( -DGTEST_HAS_PTHREAD=0 )
+endif()
+
 # Visual Studio 2012 only supports up to 8 template parameters in
 # std::tr1::tuple by default, but gtest requires 10
 if(MSVC AND MSVC_VERSION EQUAL 1700)