--- a/memory/build/mozmemory_wrap.cpp
+++ b/memory/build/mozmemory_wrap.cpp
@@ -9,61 +9,62 @@
 /* Declare malloc implementation functions with the right return and
  * argument types. */
 #define MALLOC_DECL(name, return_type, ...) \
   MOZ_MEMORY_API return_type name ## _impl(__VA_ARGS__);
 #define MALLOC_FUNCS MALLOC_FUNCS_MALLOC
 #include "malloc_decls.h"
 
 #ifdef MOZ_WRAP_NEW_DELETE
-/* operator new(unsigned int) */
-MOZ_MEMORY_API void*
-_Znwj(unsigned int size)
+#include <new>
+
+MFBT_API void*
+operator new(size_t size)
 {
   return malloc_impl(size);
 }
-/* operator new[](unsigned int) */
-MOZ_MEMORY_API void*
-_Znaj(unsigned int size)
+
+MFBT_API void*
+operator new[](size_t size)
 {
   return malloc_impl(size);
 }
-/* operator delete(void*) */
-MOZ_MEMORY_API void
-_ZdlPv(void* ptr)
+
+MFBT_API void
+operator delete(void* ptr)
 {
   free_impl(ptr);
 }
-/* operator delete[](void*) */
-MOZ_MEMORY_API void
-_ZdaPv(void* ptr)
+
+MFBT_API void
+operator delete[](void* ptr)
 {
   free_impl(ptr);
 }
-/*operator new(unsigned int, std::nothrow_t const&)*/
-MOZ_MEMORY_API void*
-_ZnwjRKSt9nothrow_t(unsigned int size)
+
+MFBT_API void*
+operator new(size_t size, std::nothrow_t const&)
 {
   return malloc_impl(size);
 }
-/*operator new[](unsigned int, std::nothrow_t const&)*/
-MOZ_MEMORY_API void*
-_ZnajRKSt9nothrow_t(unsigned int size)
+
+MFBT_API void*
+operator new[](size_t size, std::nothrow_t const&)
 {
   return malloc_impl(size);
 }
-/* operator delete(void*, std::nothrow_t const&) */
-MOZ_MEMORY_API void
-_ZdlPvRKSt9nothrow_t(void* ptr)
+
+MFBT_API void
+operator delete(void* ptr, std::nothrow_t const&)
 {
   free_impl(ptr);
 }
-/* operator delete[](void*, std::nothrow_t const&) */
-MOZ_MEMORY_API void
-_ZdaPvRKSt9nothrow_t(void* ptr)
+
+MFBT_API void
+operator delete[](void* ptr, std::nothrow_t const&)
 {
   free_impl(ptr);
 }
 #endif
 
 /* strndup and strdup may be defined as macros in string.h, which would
  * clash with the definitions below. */
 #undef strndup