diff --git a/mm/slub.c b/mm/slub.c
index 23f9d8d..a0c1365 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1204,7 +1204,7 @@
 
 	return flags;
 }
-#else
+#else /* !CONFIG_SLUB_DEBUG */
 static inline void setup_object_debug(struct kmem_cache *s,
 			struct page *page, void *object) {}