diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index e80858f5c2ab..f01c71e41bcf 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4631,9 +4631,10 @@ static void wake_all_kswapds(unsigned int order, gfp_t gfp_mask,
 					ac->nodemask) {
 		if (!managed_zone(zone))
 			continue;
-		if (last_pgdat != zone->zone_pgdat)
+		if (last_pgdat != zone->zone_pgdat) {
 			wakeup_kswapd(zone, gfp_mask, order, highest_zoneidx);
-		last_pgdat = zone->zone_pgdat;
+			last_pgdat = zone->zone_pgdat;
+		}
 	}
 }