diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 5293c4f70fba24c03f1022f629c575a486490838..793f5cebe665b5cd8c57969e94f3627a8835569e 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -3572,6 +3572,9 @@ alloc_flags_nofragment(struct zone *zone, gfp_t gfp_mask)
 		alloc_flags |= ALLOC_KSWAPD;
 
 #ifdef CONFIG_ZONE_DMA32
+	if (!zone)
+		return alloc_flags;
+
 	if (zone_idx(zone) != ZONE_NORMAL)
 		goto out;