--- a/memory/build/mozmemory_wrap.c
+++ b/memory/build/mozmemory_wrap.c
@@ -136,27 +136,16 @@ asprintf_impl(char **str, const char *fm
 
    va_end(ap);
 
    return ret;
 }
 #endif
 
 #ifdef XP_WIN
-/*
- *  There's a fun allocator mismatch in (at least) the VS 2010 CRT
- *  (see the giant comment in $(topsrcdir)/mozglue/build/Makefile.in)
- *  that gets redirected here to avoid a crash on shutdown.
- */
-void
-dumb_free_thunk(void *ptr)
-{
-  return; /* shutdown leaks that we don't care about */
-}
-
 #include <wchar.h>
 
 /*
  *  We also need to provide our own impl of wcsdup so that we don't ask
  *  the CRT for memory from its heap (which will then be unfreeable).
  */
 wchar_t *
 wcsdup_impl(const wchar_t *src)

--- a/mozglue/build/mozglue.def.in
+++ b/mozglue/build/mozglue.def.in
@@ -30,11 +30,9 @@ EXPORTS
   strndup=wrap_strndup
   strdup=wrap_strdup
   _strdup=wrap_strdup
   wcsdup=wrap_wcsdup
   _wcsdup=wrap_wcsdup
   jemalloc_stats
   jemalloc_free_dirty_pages
   jemalloc_thread_local_arena
-  ; A hack to work around the CRT (see giant comment in Makefile.in)
-  frex=dumb_free_thunk
 #endif