diff --git a/libcxxabi/test/catch_reference_nullptr.pass.cpp b/libcxxabi/test/catch_reference_nullptr.pass.cpp
--- a/libcxxabi/test/catch_reference_nullptr.pass.cpp
+++ b/libcxxabi/test/catch_reference_nullptr.pass.cpp
@@ -6,10 +6,11 @@
 //
 //===----------------------------------------------------------------------===//
 
-// UNSUPPORTED: c++03,
+// UNSUPPORTED: c++03
 // UNSUPPORTED: no-exceptions
 
 #include <cassert>
+#include <cstddef>
 #include <cstdlib>
 
 struct A {};
@@ -27,13 +28,11 @@
 
 int main(int, char**)
 {
-  using nullptr_t = decltype(nullptr);
-
   // A reference to nullptr_t can catch nullptr.
-  catch_nullptr_test<nullptr_t, true>();
-  catch_nullptr_test<const nullptr_t, true>();
-  catch_nullptr_test<volatile nullptr_t, true>();
-  catch_nullptr_test<const volatile nullptr_t, true>();
+  catch_nullptr_test<std::nullptr_t, true>();
+  catch_nullptr_test<const std::nullptr_t, true>();
+  catch_nullptr_test<volatile std::nullptr_t, true>();
+  catch_nullptr_test<const volatile std::nullptr_t, true>();
 
   // No other reference type can.
 #if 0