diff --git a/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.types/difference_type.pass.cpp b/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.types/difference_type.pass.cpp
index dc7a65e52b35..c728909477b5 100644
--- a/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.types/difference_type.pass.cpp
+++ b/libcxx/test/std/utilities/memory/allocator.traits/allocator.traits.types/difference_type.pass.cpp
@@ -60,7 +60,9 @@ namespace std
 template <>
 struct pointer_traits<C<char>::pointer>
 {
-    typedef signed char difference_type;
+    typedef C<char>::pointer pointer;
+    typedef char             element_type;
+    typedef signed char      difference_type;
 };
 
 }