diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index a5e6891..8e36353 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -417,7 +417,7 @@
 	arch_free_page(page, order);
 	if (!PageHighMem(page))
 		mutex_debug_check_no_locks_freed(page_address(page),
-			page_address(page+(1<<order)));
+						 PAGE_SIZE<<order);
 
 #ifndef CONFIG_MMU
 	for (i = 1 ; i < (1 << order) ; ++i)