diff --git a/clang/test/CodeGenCXX/new.cpp b/clang/test/CodeGenCXX/new.cpp
index c6cee1845670..3f191de23bcf 100644
--- a/clang/test/CodeGenCXX/new.cpp
+++ b/clang/test/CodeGenCXX/new.cpp
@@ -1,11 +1,12 @@
 // RUN: clang-cc %s -emit-llvm -o - | FileCheck %s
+#include <stddef.h>
 
 void t1() {
   int* a = new int;
 }
 
 // Placement.
-void* operator new(unsigned long, void*) throw();
+void* operator new(size_t, void*) throw();
 
 void t2(int* a) {
   int* b = new (a) int;