diff --git a/mm/vmscan.c b/mm/vmscan.c
index fad9be4703ec..de94881eaa92 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2513,7 +2513,7 @@ out:
 			cgroup_size = max(cgroup_size, protection);
 
 			scan = lruvec_size - lruvec_size * protection /
-				cgroup_size;
+				(cgroup_size + 1);
 
 			/*
 			 * Minimally target SWAP_CLUSTER_MAX pages to keep