diff --git a/lib/cpp/src/thrift/concurrency/Mutex.h b/lib/cpp/src/thrift/concurrency/Mutex.h
index 1763b5c..3cd8440 100644
--- a/lib/cpp/src/thrift/concurrency/Mutex.h
+++ b/lib/cpp/src/thrift/concurrency/Mutex.h
@@ -183,15 +183,6 @@
     const ReadWriteMutex& rw_mutex_;
 };
 
-
-// A little hack to prevent someone from trying to do "Guard(m);"
-// Such a use is invalid because the temporary Guard object is
-// destroyed at the end of the line, releasing the lock.
-// Sorry for polluting the global namespace, but I think it's worth it.
-#define Guard(m) incorrect_use_of_Guard(m)
-#define RWGuard(m) incorrect_use_of_RWGuard(m)
-
-
 }}} // apache::thrift::concurrency
 
 #endif // #ifndef _THRIFT_CONCURRENCY_MUTEX_H_