diff --git a/mm/highmem.c b/mm/highmem.c
index 64d8dea..1352a27 100644
--- a/mm/highmem.c
+++ b/mm/highmem.c
@@ -369,7 +369,7 @@ void kunmap_high(struct page *page)
 }
 
 EXPORT_SYMBOL(kunmap_high);
-#endif
+#endif	/* CONFIG_HIGHMEM */
 
 #if defined(HASHED_PAGE_VIRTUAL)
 
@@ -481,4 +481,4 @@ void __init page_address_init(void)
 	}
 }
 
-#endif	/* defined(CONFIG_HIGHMEM) && !defined(WANT_PAGE_VIRTUAL) */
+#endif	/* defined(HASHED_PAGE_VIRTUAL) */