diff --git a/mm/page_isolation.c b/mm/page_isolation.c
index abbf422144850977dfba2f657c63330e5d2da217..756d1542f2c8f2e64230b1e91bb18939c8c907b9 100644
--- a/mm/page_isolation.c
+++ b/mm/page_isolation.c
@@ -89,7 +89,7 @@ static void unset_migratetype_isolate(struct page *page, unsigned migratetype)
 	 */
 	if (PageBuddy(page)) {
 		order = buddy_order(page);
-		if (order >= pageblock_order) {
+		if (order >= pageblock_order && order < MAX_ORDER - 1) {
 			pfn = page_to_pfn(page);
 			buddy_pfn = __find_buddy_pfn(pfn, order);
 			buddy = page + (buddy_pfn - pfn);