diff --git a/unittests/ADT/SmallVectorTest.cpp b/unittests/ADT/SmallVectorTest.cpp
index 78dc393..f4da54d 100644
--- a/unittests/ADT/SmallVectorTest.cpp
+++ b/unittests/ADT/SmallVectorTest.cpp
@@ -77,7 +77,7 @@
     return c0.getValue() == c1.getValue();
   }
 
-  friend bool ATTRIBUTE_UNUSED
+  friend bool LLVM_ATTRIBUTE_UNUSED
   operator!=(const Constructable & c0, const Constructable & c1) {
     return c0.getValue() != c1.getValue();
   }