diff --git a/mysys/my_malloc.c b/mysys/my_malloc.c
index 719c13a040e..99a15e6f432 100644
--- a/mysys/my_malloc.c
+++ b/mysys/my_malloc.c
@@ -117,6 +117,7 @@ void *my_malloc(size_t size, myf my_flags)
                       MY_TEST(my_flags & MY_THREAD_SPECIFIC));
     update_malloc_size(size + MALLOC_PREFIX_SIZE,
                        MY_TEST(my_flags & MY_THREAD_SPECIFIC));
+    TRASH_ALLOC(point, size);
     DBUG_EXECUTE_IF("simulate_out_of_memory",
                     {
                       /* my_free() handles memory accounting */