diff --git a/mm/internal.h b/mm/internal.h
index 684f7aa..a85a3ab 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -51,7 +51,8 @@
 	VM_BUG_ON(page_mapcount(page) < 0);
 	if (get_page_head)
 		atomic_inc(&page->first_page->_count);
-	atomic_inc(&page->_mapcount);
+	if (compound_tail_refcounted(page->first_page))
+		atomic_inc(&page->_mapcount);
 }
 
 /*