diff --git a/mm/page_isolation.c b/mm/page_isolation.c
index 9c03dca..6744235 100644
--- a/mm/page_isolation.c
+++ b/mm/page_isolation.c
@@ -200,8 +200,11 @@
 			continue;
 		}
 		page = pfn_to_page(pfn);
-		if (PageBuddy(page))
+		if (PageBuddy(page)) {
+			if (get_freepage_migratetype(page) != MIGRATE_ISOLATE)
+				break;
 			pfn += 1 << page_order(page);
+		}
 		else if (page_count(page) == 0 &&
 			get_freepage_migratetype(page) == MIGRATE_ISOLATE)
 			pfn += 1;