diff --git a/include/nuttx/mm/kasan.h b/include/nuttx/mm/kasan.h
index 9cf6fb4820..a518ea450f 100644
--- a/include/nuttx/mm/kasan.h
+++ b/include/nuttx/mm/kasan.h
@@ -48,7 +48,7 @@
 #  define kasan_stop()
 #  define kasan_debugpoint(t,a,s) 0
 #  define kasan_init_early()
-#  define kasan_bypass(state) false
+#  define kasan_bypass(state) ((void)state, state)
 #else
 
 #  define kasan_init_early() kasan_stop()
diff --git a/mm/mm_heap/mm_malloc_size.c b/mm/mm_heap/mm_malloc_size.c
index 544b0e306e..895f11ee2b 100644
--- a/mm/mm_heap/mm_malloc_size.c
+++ b/mm/mm_heap/mm_malloc_size.c
@@ -75,6 +75,5 @@ size_t mm_malloc_size(FAR struct mm_heap_s *heap, FAR void *mem)
   size = MM_SIZEOF_NODE(node) - MM_ALLOCNODE_OVERHEAD;
 
   kasan_bypass(flag);
-  UNUSED(flag);
   return size;
 }