1 files changed, 5 insertions, 6 deletions
diff --git a/lib/Support/Windows/Mutex.inc b/lib/Support/Windows/Mutex.inc
index ab79d079122f1..0af145ec9a4e6 100644
--- a/lib/Support/Windows/Mutex.inc
+++ b/lib/Support/Windows/Mutex.inc
@@ -20,15 +20,14 @@
 #include "llvm/Support/Mutex.h"
 
 namespace llvm {
-using namespace sys;
 
-MutexImpl::MutexImpl(bool /*recursive*/)
+sys::MutexImpl::MutexImpl(bool /*recursive*/)
 {
   data_ = new CRITICAL_SECTION;
   InitializeCriticalSection((LPCRITICAL_SECTION)data_);
 }
 
-MutexImpl::~MutexImpl()
+sys::MutexImpl::~MutexImpl()
 {
   DeleteCriticalSection((LPCRITICAL_SECTION)data_);
   delete (LPCRITICAL_SECTION)data_;
@@ -36,21 +35,21 @@ MutexImpl::~MutexImpl()
 }
 
 bool
-MutexImpl::acquire()
+sys::MutexImpl::acquire()
 {
   EnterCriticalSection((LPCRITICAL_SECTION)data_);
   return true;
 }
 
 bool
-MutexImpl::release()
+sys::MutexImpl::release()
 {
   LeaveCriticalSection((LPCRITICAL_SECTION)data_);
   return true;
 }
 
 bool
-MutexImpl::tryacquire()
+sys::MutexImpl::tryacquire()
 {
   return TryEnterCriticalSection((LPCRITICAL_SECTION)data_);
 }