diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index ef2d1e7..48aee0f 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4389,6 +4389,7 @@
 	pgdat_resize_init(pgdat);
 	pgdat->nr_zones = 0;
 	init_waitqueue_head(&pgdat->kswapd_wait);
+	init_waitqueue_head(&pgdat->pfmemalloc_wait);
 	pgdat->kswapd_max_order = 0;
 	pgdat_page_cgroup_init(pgdat);