diff --git a/llvm/include/llvm/Support/Debug.h b/llvm/include/llvm/Support/Debug.h
index 27e4221c9e7f..cedb50dcd29b 100644
--- a/llvm/include/llvm/Support/Debug.h
+++ b/llvm/include/llvm/Support/Debug.h
@@ -72,7 +72,9 @@ public:
 
   template <typename Ty>
   llvm_ostream& operator << (const Ty& Thing) {
+#ifndef NDEBUG
     if (Stream) *Stream << Thing;
+#endif
     return *this;
   }
 };