diff --git a/include/linux/swap.h b/include/linux/swap.h
index 54eac8a..5b1fdf1 100644
--- a/include/linux/swap.h
+++ b/include/linux/swap.h
@@ -155,6 +155,7 @@
 /* linux/mm/page_alloc.c */
 extern unsigned long totalram_pages;
 extern unsigned long totalhigh_pages;
+extern unsigned long totalreserve_pages;
 extern long nr_swap_pages;
 extern unsigned int nr_free_pages(void);
 extern unsigned int nr_free_pages_pgdat(pg_data_t *pgdat);