diff --git a/unittests/ExecutionEngine/Orc/OrcTestCommon.h b/unittests/ExecutionEngine/Orc/OrcTestCommon.h
index 3ae2ed84b43..1b2859b51d0 100644
--- a/unittests/ExecutionEngine/Orc/OrcTestCommon.h
+++ b/unittests/ExecutionEngine/Orc/OrcTestCommon.h
@@ -55,7 +55,8 @@ namespace llvm {
   class TypeBuilder<DummyStruct, XCompile> {
   public:
     static StructType *get(LLVMContext &Context) {
-      return StructType::get(TypeBuilder<types::i<32>[256], XCompile>::get(Context), NULL);
+      return StructType::get(
+          TypeBuilder<types::i<32>[256], XCompile>::get(Context), nullptr);
     }
   };