diff --git a/mm/mm_heap/mm_free.c b/mm/mm_heap/mm_free.c
index 00e715ab29..a92f467aa7 100644
--- a/mm/mm_heap/mm_free.c
+++ b/mm/mm_heap/mm_free.c
@@ -84,6 +84,8 @@ void mm_free(FAR struct mm_heap_s *heap, FAR void *mem)
       return;
     }
 
+  DEBUGASSERT(mm_heapmember(heap, mem));
+
 #if CONFIG_MM_HEAP_MEMPOOL_THRESHOLD != 0
   if (mempool_multiple_free(heap->mm_mpool, mem) >= 0)
     {
@@ -104,8 +106,6 @@ void mm_free(FAR struct mm_heap_s *heap, FAR void *mem)
 
   kasan_poison(mem, mm_malloc_size(heap, mem));
 
-  DEBUGASSERT(mm_heapmember(heap, mem));
-
   /* Map the memory chunk into a free node */
 
   node = (FAR struct mm_freenode_s *)((FAR char *)mem - SIZEOF_MM_ALLOCNODE);
diff --git a/mm/mm_heap/mm_realloc.c b/mm/mm_heap/mm_realloc.c
index 0fab7c3b07..f8de8b6402 100644
--- a/mm/mm_heap/mm_realloc.c
+++ b/mm/mm_heap/mm_realloc.c
@@ -81,6 +81,8 @@ FAR void *mm_realloc(FAR struct mm_heap_s *heap, FAR void *oldmem,
       return mm_malloc(heap, size);
     }
 
+  DEBUGASSERT(mm_heapmember(heap, oldmem));
+
 #if CONFIG_MM_HEAP_MEMPOOL_THRESHOLD != 0
   newmem = mempool_multiple_realloc(heap->mm_mpool, oldmem, size);
   if (newmem != NULL)
@@ -129,7 +131,6 @@ FAR void *mm_realloc(FAR struct mm_heap_s *heap, FAR void *oldmem,
 
   DEBUGVERIFY(mm_lock(heap));
   DEBUGASSERT(oldnode->size & MM_ALLOC_BIT);
-  DEBUGASSERT(mm_heapmember(heap, oldmem));
 
   /* Check if this is a request to reduce the size of the allocation. */